Bonus buy slots in Australia: what the feature costs, where it lives, and why no licence covers it

29 October 2026 — register snapshot against the Australian Communications and Media Authority’s (ACMA) published formal-warning list and blocking-request rounds.

Most pages about bonus buy slots treat the question as if it were a normal shopping problem: ten casinos, ranked, pick one. The shape of the answer changes once you bring it to Australia. Online casino games and online pokies cannot be licensed here under the Interactive Gambling Act 2001 (IGA), and no state or territory issues that kind of licence. Bonus buy slot play is an online casino product by construction — a feature inside a real-money online slot machine — so what the search actually returns is a market that exists outside the Australian rules, served by operators the ACMA has been naming for years. Reading it like a normal ranking misses that completely.

The pages that follow try to do two things at once. They set out what a bonus buy slot is, how the feature works, and what the math underneath it looks like, because the price of a bonus round is the kind of number a player should see before they ever see an offer. They then set out the Australian frame around it: which sites the ACMA has acted against, which businesses sit behind those sites, and where the protection a player usually relies on — a local complaints body, a self-exclusion register, a credit-card ban — runs out the door the moment play moves offshore. The aim is not to point anyone at a place to gamble. The aim is to make the comparison a reader is about to make, with whatever they type into a search engine next, a comparison they actually understand.

Legality and regulation: where bonus buy slot play sits under Australian law

The short version is short for a reason. The Interactive Gambling Act 2001, strengthened by the Interactive Gambling Amendment Act 2017, makes it an offence for a provider to supply online casino games — online slots included — to a person physically in Australia. No state or territory issues a licence for that kind of product. What is licensed is a narrower set: wagering on racing and sport placed before the event, lotteries and keno. Online pokies and online table games sit on the other side of that line.

Bonus buy slots sit inside that prohibited category by definition. The feature is a button inside a real-money online slot game. There is no licensed Australian product that contains it. A site that lets a player in Australia buy a bonus round for real money is offering exactly the service the IGA says may not be offered to Australians, and the regulator has acted against a long list of brands for doing precisely that.

Several details matter when the page turns to specific operators.

First, what a “licence” on an offshore casino’s footer actually means. Offshore sites display Curacao, Anjouan or Kahnawake badges. None of those licences authorises the operator to take Australian customers. The IGA targets the provider, not the individual player, so an Australian punter does not face prosecution for opening an account. What they give up is everything else: an Australian consumer-protection body to complain to, a local regulator to escalate to, a BetStop-style exclusion register connected to the site, and the credit-card ban that applies to Australian-licensed wagering. The bonus-buy product sits inside that unprotected offshore frame, on top of every other gap.

Second, what the regulator has actually been doing. The ACMA investigates complaints, issues formal warnings under the IGA, and can direct Australian internet service providers to block illegal sites. A formal warning is the step before blocking. A blocking request is the next step up. As of the round reported on 26 June 2026, the ACMA’s running total stood at 1,751 illegal gambling and affiliate marketing websites blocked since the first blocking request in November 2019, with more than 230 unlicensed gambling services having left the Australian market since enforcement was strengthened in 2017. The most recently reported blocking round covered 12 sites: 7Signs, ChromaBet, Donbet, Duospin, Freshbet, Slots Gem, Jacks Club, Lucky Start, Pointsbetz, Spinrise, Vinyl Casino and Wildsino.

Third, what the player-protection frame looks like onshore, because the contrast is sharp. The National Self-Exclusion Register — BetStop — has been live since August 2023, but it binds Australian-licensed online and phone wagering services. An offshore casino is not connected to it. Gambling Help Online runs a 24-hour chat service and a national helpline (1800 858 858). Both are free and confidential. Neither requires the reader to have ever played with a licensed operator.

Fourth, the reform that’s on the calendar. The Interactive Gambling Amendment (Gambling Reform) Bill 2026 passed Parliament on 19 August 2026, with advertising and inducement measures commencing on 1 January 2027. That is law with a start date, not yet in force on a 2026 page. It does not legalise bonus-buy slot play; it tightens the inducement side of the rules.

Responsible play: where the help is when the topic stops being theoretical

A guide that lists ACMA action without telling a reader where to turn when play has stopped being a choice is half a guide. The Australian frame for that is short and works whether the play happened on a licensed bookmaker, on a pokies pub, or on an offshore casino the ACMA has blocked.

Gambling Help Online is the front door. The national helpline (1800 858 858) is free, 24 hours a day, and runs alongside a chat service. Counsellors are used to the specific situation of someone whose play has moved offshore, where the local protections do not reach. The service is also used by people who have never placed a bet but want to talk through a family member’s play. Confidentiality is built into the service — using it does not put a person on any list and does not require them to identify the operator they have been using.

BetStop, the National Self-Exclusion Register, binds Australian-licensed online and phone wagering services. A person registered with BetStop is blocked from opening new accounts with every participating Australian-licensed operator and from logging into existing ones for the period they nominate, which can run from a minimum of three months up to a lifetime. Offshore casinos do not connect to BetStop, which is why an exclusion taken out under BetStop does not by itself close off an offshore account. People who have moved some of their play offshore and want to step back should treat BetStop as the local layer and talk to a Gambling Help Online counsellor about the rest.

State and territory support lines add a regional layer for people who want to talk to someone who knows their jurisdiction. The same federal helpline number routes into them. The clinical question — when does recreational play become something more serious? — is one a counsellor is trained to work through with the caller; the threshold is not something a webpage is in a position to second-guess.

The financial side matters too. A person who has chased losses on bonus-buy play — where the size of a single spin is set by a button, not by the pace of the reels — has often been playing with money they did not have when they sat down. The National Debt Helpline (1800 007 007) runs alongside the gambling line and treats the two as linked. A self-exclusion taken under financial pressure tends not to hold; one taken with a budget plan does. That is a counsellor call, not a webpage conclusion.

Bonus buys explained: what the button actually does to the math of a slot

A bonus buy is a feature on a real-money online slot that lets a player skip the wait for a bonus round and pay for it directly. The base game keeps running as usual: the player spins reels, lands combinations and watches for the scatter or other trigger that opens the bonus round. The button changes the relationship between trigger and entry: instead of waiting for a scatter combination to land at random, the player pays a fixed multiple of their stake — typically somewhere between 50× and 200× the bet — and is dropped straight into the bonus round with the parameters set to the buy-in price.

What that does to the math is the part the marketing copy leaves out. A slot’s return-to-player (RTP) figure is calculated across the full game — base spins plus bonus rounds, weighted by how often each is hit. The base game on most bonus-buy slots is calibrated so that, in the absence of buying, the bonus round triggers rarely enough that the overall RTP works out to the published number. A player who buys the bonus round is paying for the right to spend time inside the part of the game that pays out best, and the game’s RTP for that buy-in path is published separately in most cases. The two numbers are not the same.

Two practical points follow.

The first is that buying the bonus round does not change the underlying odds of the bonus game. The bonus round, once entered, plays out the same way it would have played out had it been triggered by a scatter. What the player has paid for is access, not an edge. A line that markets the buy as “skip straight to the bonus” is literally true and economically beside the point.

The second is that the published bonus-buy RTP is usually lower than the published base-game RTP, because the buy price has to cover the operator’s edge on top of what the bonus round itself returns. A slot whose overall RTP is published at, say, 96% may publish its bonus-buy RTP at a figure below that, because the buy path is a different product with a different margin. The exact relationship between the two numbers is set by the developer, not by the operator, and varies title by title.

That is the part of the topic that explains why a regulator might be uneasy about it. The UK Gambling Commission restricted bonus-buy features in 2023 on the grounds that they accelerate spend and remove the natural pacing of a slot session; the feature is permitted in some form in the UK under tightly controlled conditions. Other jurisdictions have moved in different directions. In Australia the question does not arise for licensed product because no licensed product carries it. The offshore sites that do carry it are not subject to those restrictions.

Bonuses and free spins: the inducement layer on top of an offshore product

The bonus structure an offshore casino hangs in front of bonus-buy slot play is one of the inducements Australian law treats with particular care. Deposit matches, free-spin packages, reload bonuses, cashback offers and tournament entries all fall under the broad inducement category that the IGA already restricts, and the 2026 reform tightens that further with a 1 January 2027 start date. The point is not the headline number — the 100% match, the 200 free spins — but what sits underneath.

The standard offshore welcome package on a slot-focused site has the same shape as a sportsbook’s: a percentage match on the first deposit, sometimes split across the first two or three deposits, with a free-spin bundle attached. The match number — 100%, 150%, 200% — is the smallest part of the deal. What shapes the cost is the wagering requirement, which is the multiple of the bonus (and often the deposit too) the player has to turn over before any of the bonus money becomes withdrawable. A 100% match on a A$200 deposit with a 40× wagering requirement on the bonus alone means A$8,000 of qualifying turnover before withdrawal opens up, on top of the deposit the player has already spent. The figure looks mechanical until it is run against the bet sizes and spin counts the player’s bankroll can actually sustain.

Free-spin packages carry their own layer. The headline “200 free spins” is a count of spins, not a payout, and the spins are usually locked to a single title at a fixed per-spin stake that the operator sets, often a small fraction of the coin size the same title allows in normal play. Winnings from free spins typically carry their own wagering requirement, which can be higher than the deposit-match requirement, and a maximum cashout cap that bounds what the free-spin portion of the offer can ever pay out. A free-spin package that pays out a capped A$100 even when the underlying slot would have paid out A$2,000 is a real product, and the cap is the part that decides what it is worth.

Bonus buy slots complicate the inducement layer in a specific way. The bonus-buy button is a stake multiple that runs into the hundreds of base-game bets. A free-spin package designed for base-game play at A$0.20 per spin does not usually extend to bonus-buy spins, and where it does the stake is often reduced to match the free-spin allocation rather than the player’s actual stake. Deposit matches carry the same wrinkle: a wagering requirement of 40× the bonus on a A$200 bonus is A$8,000 of turnover, and a single bonus-buy at 100× stake burns through that turnover in a small number of transactions. The ratio between the bonus size and the buy price is the part a player should check before they trigger a bonus-buy under an active bonus.

Onshore, none of this exists in the form described. The inducement restrictions that apply to Australian-licensed wagering are not the same shape as the inducements an offshore casino offers, and the credit-card and crypto bans that bind Australian-licensed operators from 11 June 2024 do not bind the offshore sites that offer bonus-buy play. The headline on an offshore site is set by a different rulebook.

Top comparison: what a fair read of the ACMA’s list looks like

The table below is not a ranking. Each brand appears here because the ACMA has issued a formal warning about it for offering prohibited online gambling services to Australians. The columns matter because they are what a reader is actually choosing between when they weigh these sites against each other: when the regulator acted, which legal entity sat behind the brand at the time, and whether the brand’s own materials tell us anything specific about bonus-buy slot support.

The column on subject support is honest because most of it has to be. Bonus-buy slot play is a feature inside a real-money online slot. Most of the brands on the list do not publish provider-level information about which slot titles they carry and which they do not, in a form that lets a third party verify what is on the lobby from outside an account. Where provider listings or media coverage confirm a brand’s relationship to a slot developer, that is what the table reports. Where they do not, the cell carries an em dash rather than a guess. The brands that the ACMA has acted against are not a curated set — they are a regulator’s list, with the gaps a regulator’s list leaves in it.

What the table does not carry is the comparison a reader might want next: bonus terms, wagering requirements, withdrawal times, payment-route restrictions. None of those figures were available from sources that were not affiliate marketing pages, and the page’s job is to describe what an offer is worth, not how to claim it. The terms an offshore casino publishes about bonus-buy play are the kind of terms that change without notice, and the brands on this list are not in a position to give a reader the kind of consumer protection an Australian-licensed operator does.

Featured operators: the brands the ACMA has named

RocketPlay — two warnings across two operators

RocketPlay carries two entries on the ACMA’s list because the brand changed hands. The earlier warning, in May 2022, named Dama N.V. as the operator of a group of six casino brands that included RocketPlay. The more recent warning, in March 2026, named Pulsup Ltd as the operator of Rocketplay specifically. The pattern is the common one on this list: a brand’s licence badge may say one thing, and the regulator’s record may say another. The IGA targets the provider regardless. A reader comparing RocketPlay against any other brand on the list is looking at two separate legal entities being told, in two separate years, to stop offering the same prohibited product to Australians.

Level Up Casino — the warning that started a wider round

Level Up Casino was one of six brands named in the May 2022 warning to Dama N.V., alongside Bambet, Dazard, Rocketplay, Wild Tornado and Cobra Casinos. The level of provider information in the public record is uneven across that group; Level Up is the one for which BGaming’s own provider listings reference the brand, which is the kind of detail that gives the subject-support column something to say. The Dama N.V. group is the same operator that received the March 2025 and May 2025 warnings over Woo Casino and Spirit Casino respectively — a sequence that tells the reader the ACMA’s action against the group did not end with the 2022 warning.

Woo Casino — Dama N.V.’s 2025 warning

Woo Casino received its own formal warning in March 2025, again under Dama N.V. as the named operator. A brand carrying a separate 2025 warning from the same parent group as Level Up Casino is not unusual on this list, but the timing matters: the ACMA returned to the Dama N.V. group three years after the original warning, which suggests the earlier action did not end the activity on its own.

Spirit Casino — the second 2025 Dama N.V. warning

Spirit Casino received a formal warning in May 2025, again under Dama N.V. The pattern — one operator, two years, three warnings across three brands — is the shape the ACMA’s published record takes for groups that have not left the Australian market after a first warning. A reader who recognises the operator name across multiple entries on this list is seeing the same legal entity being told the same thing more than once.

National Casino — the Consolutetish S.R.L. group

National Casino received a formal warning in July 2025, with Consolutetish S.R.L. named as the operator. Wikipedia’s coverage of the operator references the brand, which is what puts it into the subject-support column. Consolutetish S.R.L. was named in the same July 2025 warning round as Bizzo Casino; the two brands sit on the same line of the ACMA’s published list because they share an operator.

Bizzo Casino — two warnings across two operators

Bizzo Casino carries two entries for the same reason RocketPlay does. The July 2025 warning named Consolutetish S.R.L. as the operator. An earlier 2022 warning had named TechSolutions (CY) Group Limited and TechSolutions Group N.V. as the operators of Bizzo Casino. Two operators, two warnings, one brand: the pattern is a brand that has changed hands at least once since the regulator first acted against it. The brand’s current operator, per the 2025 warning, is the one the ACMA has most recently told to stop.

Ignition Casino — Bamboo Media

Ignition Casino received a formal warning in July 2025, with Bamboo Media named as the operator. The brand is one of two on the ACMA’s list with a US-facing reputation; the Australian-facing question is the same as for every other brand here, and the operator name is what the regulator recorded.

Instant Casino — EOD Code SRL

Instant Casino received a formal warning in February 2025, with EOD Code SRL named as the operator. It is one of the more recent entries on the list and the brand the ACMA’s February 2025 warning specifically named. Reading the brands chronologically by warning date is a way to see how the regulator’s pace has held up across the past two years.

Jackbit — Ryker B.V.

Jackbit received a formal warning in April 2026, with Ryker B.V. named as the operator. CasinOK was named in the same warning round; the two brands share an operator on the ACMA’s published record. The April 2026 timing puts this near the front of the recent enforcement list.

Casino Intense — Sterplay Holding Ltd

Casino Intense received a formal warning in April 2025, with Sterplay Holding Ltd named as the operator. Casino Intense is one of the few brands on the list with multiple independent references — ABC News, the ACMA’s own publications and Crown Melbourne’s coverage — and the subject-support column carries that. The same operator also surfaces in the wider regulatory story for other reasons; the ACMA’s published record is the relevant slice for the purposes of this page.

Sky Crown — Hollycorn N.V.

Sky Crown received a formal warning in September 2022, with Hollycorn N.V. named as the operator. The same operator was named for Blue Leo in the same published warning. Hollycorn N.V. is a long-running offshore group on the ACMA’s list; Sky Crown and Blue Leo are the two brands the regulator’s published warning specifically named.

Overview: the wider market these brands sit inside

The brands above are not the offshore market. They are the slice of the offshore market the ACMA has chosen to publish a formal warning about. The regulator’s blocking-request list, which has run to 1,751 sites since November 2019, points at a much larger pool. The brands on this page are the ones whose names turn up repeatedly when an Australian reader searches for bonus-buy slot play, and whose operators the ACMA has recorded by name.

Two figures put the scale of the wider market into proportion. H2 Gambling Capital’s 2025 report estimates that Australians lose about A$3.9 billion a year to illegal gambling sites, and that the share of gambling going through legal channels fell from 74% in 2021 to 64%. Those numbers do not break out bonus-buy slots specifically; the offshore casino product is one piece of the illegal market, and bonus-buy slot play is one product within that piece. The figure matters because it sets the size of the gap between what an Australian-licensed market looks like and what the actual market looks like.

The land-based Australian pokie market is the licensed frame the offshore product sits against. The count of pokies-style slot machines outside casinos is the figure a regulator publishes: 87,298 in New South Wales as of June 2023, 26,380 in Victoria across 2021–22, 21,122 in Queensland in October 2023, 11,672 in South Australia in September 2023, and 3,587 in the ACT in November 2023. None of those machines carries a bonus-buy feature. A punter sitting at one in a pub or club in Sydney, Melbourne, Brisbane, Adelaide or Canberra cannot pay to skip the bonus round, because the licensed product does not have the feature. The choice is between the licensed land-based product on one side and the offshore online product on the other; the two products are not substitutes.

The regulatory frame is also where the licensing of the legal side sits. The Northern Territory Racing and Wagering Commission (NTRWC) regulates 52 of Australia’s online bookmakers — including Sportsbet, Bet365 and Ladbrokes — which are licensed in the Territory for tax reasons; the commission has no full-time staff and meets once a month in Darwin. That is the body that regulates the licensed Australian wagering market. The NTRWC does not regulate online casinos because online casinos are not licensed in Australia to be regulated.

The history of the slot machine itself is the wider context for a reader who has not followed the topic. Charles Fey of San Francisco developed the first automatic slot mechanism in the late 19th century — a three-reel machine with five symbols (horseshoes, diamonds, spades, hearts and the Liberty Bell) where three bells in a row paid the top prize of ten nickels. Bally’s “Money Honey,” released in 1963, was the first slot machine with a bottomless hopper and automatic payout of up to 500 coins without an attendant. The first video slot machine was developed in 1976 by Fortune Coin Co. in Kearny Mesa, California. New South Wales legalised slot machines in 1956; by 2010 Australia operated an estimated 97,103 gaming machines outside casinos, a per-capita rate about five times that of the United States. Modern video slot machines can use five or more reels with 50 or more symbols per reel, producing odds as high as 300 million to one against a top combination, compared with a classic mechanical three-reel machine with about 10 symbols per reel offering roughly 1,000 possible combinations. None of that history is a recommendation. It is the shape of the product a reader is sitting in front of when they open an offshore casino lobby.

In the United States, state regulation sets minimum slot machine payout percentages that vary by jurisdiction: Nevada requires at least 75%, Mississippi at least 80%, and New Jersey at least 83%. Australian regulation does not operate on that minimum-payout model for the offshore market because the offshore market is not licensed here. The minimum-payout framework is what a reader comparing Australian rules to American rules is reaching for, and the comparison stops being a fair one the moment the play moves offshore.

How fast the regulator has been moving: the blocking rate

The ACMA’s blocking pace is the figure that puts everything else on the page in proportion. A formal warning is a letter to a provider telling them to stop offering prohibited services to Australians. A blocking request is the next step up: the regulator asks Australian internet service providers to make the site unreachable from an Australian IP address. The blocking request is the metric a reader can track, because the ACMA publishes the running total.

The first blocking request went out in November 2019. The most recent published running total, in the round reported on 26 June 2026, is 1,751 illegal gambling and affiliate marketing websites blocked. That is roughly 1,750 websites blocked across roughly six and a half years, or an average that works out to somewhere between 200 and 300 sites per year over the full period — though the pace has not been even. The early years after the 2017 enforcement strengthening were quieter; the rate picked up as the regulator’s process became faster and as more affiliate marketing pages came into scope alongside the casino brands themselves.

The arithmetic belongs to the page because the rate is the headline number a reader leaves with. As a band: somewhere between 200 and 300 sites per year have been blocked since November 2019, with the rate accelerating over the past two years as affiliate marketing pages have been pulled into the same blocking regime as the casino brands. The condition is the regulator’s own published running total, not a forecast; a reader who wants the next figure should look at the ACMA’s own updates rather than extrapolate.

What that figure does not say is whether any individual brand on the list has been blocked. A formal warning is the step before blocking, and a blocking request is the next step up. Some brands on this page have only been warned; some have been warned and then blocked; some have changed operators and continued operating under a new name. The ACMA’s blocking list and its formal-warning list are two separate publications, and the relationship between them is what determines what an Australian reader sees when they try to load a given site.

The comparison’s edge: what the offshore product costs a player beyond the stake

The comparison a reader is about to make is not between two bonus offers. It is between the offshore bonus-buy product and the licensed alternatives that do not carry it. The cost of choosing the offshore product is not just the per-spin loss the math suggests. It is the loss of the layer of protection an Australian-licensed operator is required to provide.

A credit card, credit-related product or digital currency cannot be used to fund a licensed Australian wagering account since 11 June 2024. Penalties for licensed operators that breach that rule run up to A$247,500. The legal deposit routes for a licensed wagering account are debit card, bank transfer, PayID/Osko and BPAY. An offshore casino is not bound by any of those rules. A site that asks for a credit card or a crypto deposit from an Australian customer is operating outside the Australian rules by definition, and the deposit method is the cleanest signal of which side of the line the operator is on.

A bonus buy decision interacts with the deposit rules in a specific way. A bonus-buy stake is set by the player; it can run to hundreds of base-game bets. A player funding that stake with a credit card on an Australian-licensed wagering account cannot, because the credit-card ban applies. A player funding the same stake on an offshore casino with a credit card or with USDT is not subject to that ban. The credit-card ban is one of the inducement-side protections the IGA’s 2026 reform extends in spirit, and an offshore casino is the place the ban does not reach.

The complaints layer works the same way. An Australian-licensed operator sits inside an Australian regulatory frame that gives the player a place to escalate if a withdrawal is refused or a bonus is not honoured. An offshore casino does not. The withdrawal problems that surface most often on affiliate marketing sites — bonus terms changed mid-promotion, wagering requirements recalculated after a withdrawal request, free-spin winnings voided because the wrong game was played — are exactly the complaints the local complaints body is set up to handle. On an offshore site, there is no equivalent body.

The self-exclusion frame has the same gap. BetStop binds Australian-licensed online and phone wagering services. An offshore casino is not connected to it. A punter who has registered with BetStop to step back from wagering has not stepped back from offshore casino play unless they take that step separately. Gambling Help Online (1800 858 858) is the place that conversation starts; BetStop is the local layer that does not extend offshore.

The tax frame is its own point. Gambling winnings of a recreational player are not assessable income (section 6-5 ITAA 1997) and losses are not deductible, unless the person carries on a business of gambling. The model is the same whether the play is on a licensed Australian wagering account or on an offshore casino; the difference is the operator’s record-keeping and the player’s ability to verify it. A player relying on an offshore casino’s transaction history to substantiate a tax position has fewer safeguards than a player relying on an Australian-licensed operator’s.

Frequently asked questions

How does a bonus-buy feature let a player skip straight to a slot’s bonus round?

A bonus-buy button is a stake-multiple purchase inside a real-money online slot that drops the player directly into the bonus round without waiting for a scatter combination to trigger it. The price is typically somewhere between 50× and 200× the player’s base-game stake, set by the developer. The bonus round then plays out exactly as it would have played had it been triggered by chance.

Is bonus-buy slot play available on any licensed land-based pokie in Australia?

No. Australian-licensed land-based pokies, in pubs, clubs and casinos, do not carry a bonus-buy feature. The product is an online casino feature, and online casino games cannot be licensed in Australia. A punter at a NSW pub, a Victorian club, a Queensland hotel, an SA venue or an ACT pub cannot buy a bonus round because the machine in front of them does not have the button.

Why have some regulators restricted or banned bonus-buy slot features overseas?

Regulators that have moved on bonus-buy features have generally done so on player-protection grounds: the feature accelerates spend, removes the natural pacing of a slot session, and gives the player a stake multiplier that runs into the hundreds of base-game bets in a single click. The UK Gambling Commission restricted the feature in 2023 under tightly controlled conditions. Australia has not needed a separate restriction because the feature is not a licensed product here.

Does buying a bonus round change the underlying odds of that slot’s bonus game?

No. The bonus round plays out the same way whether it is triggered by a scatter or entered through a buy. What the player has paid for is access, not an edge. A marketing line that frames the buy as improving the odds is wrong; the published bonus-buy RTP is typically lower than the slot’s overall RTP, because the buy price has to cover the operator’s edge on top of the bonus round’s own return.

Can an offshore site legally offer bonus-buy slots for real money to Australians?

No. The Interactive Gambling Act 2001 makes it an offence for a provider to supply online casino games, including online slots, to a person in Australia. Bonus-buy slot play is an online casino product by construction. No state or territory issues the licence an offshore site displays. The IGA targets the provider, not the individual player, but an Australian punter on an offshore site has no Australian consumer protection, no local complaints body, no BetStop connection and no credit-card ban.

Is a bonus-buy purchase treated as a separate bet under Australian gambling law?

The IGA does not break out bet types; it treats online casino games as a prohibited category. A bonus-buy purchase is part of the prohibited online casino product because it is a feature inside that product, not a separate kind of bet. The legal characterisation is the same as the underlying slot. The offshore sites that offer the feature operate outside the Australian rule regardless of how the inside of the slot is structured.