Modern slot machines

Isn't it true many modern slot machines have bonuses and features that determine "jackpots" ($1,200+ payouts)? The game will continue to play ( often on it's own) for several minutes before the jackpot is officially triggered, but once it went into a particular bonus mode it was going to hit. All this, to say it is not the last person to hit the button that is the winner, but the person who put it in " bonus mode" if 2 people are taking turns? Further, determining what the bonus mode screen looks like can be difficult with the variety and complexity of machines nowadays.

Lastly, does anybody have article, chart or stats that point to this fact? I have seen some in these forums mention how they are slot designers.

Great question — and you're mostly right, but there's an important nuance.

Modern video slots use a Random Number Generator (RNG) that determines the outcome the instant you press the spin button. The bonus animations that play out afterward are just a visual presentation of a result already decided. So yes, the person who triggers the bonus sequence is the "winner" in the sense that their spin determined the outcome — not whoever presses the button during the animation.

However, this is different from the accumulated-value machines (persistent state slots like Buffalo Link, Dragon Link, etc.) where actual game state carries over between players. On those machines, one player genuinely can build up the bonus and another player can walk up and collect it. That's a distinct mechanic from what you're describing.

For the standard "bonus mode" you're referring to — where the game locks into a guaranteed payout sequence — the math was settled on your spin. Proving this in a dispute would be nearly impossible in practice, which is why casino floor staff generally don't get involved unless there's physical interference at the machine.

Wizard's articles on slot RNG mechanics go deeper on this if you want the full breakdown.

My interest is not in the RNG, but more in the difficulty of determining the winner given the # of bonus modes. Can you point to a article that points to this fact

I think casinos will consider whose Player's card is in the machine when the jackpot is won over who was pushing buttons alternately with another. One of them could get banned from the casino for playing on another's card when they don't get paid the jackpot. Casinos could call surveillance and find out what was going on when the machine hit. But really, these slot players need to learn that it's one player per machine at a time.

Good follow-up — that's actually a more interesting question than the RNG part.

The difficulty in tracking "which bonus mode caused the win" is real, and there's limited public documentation on it. Here's what's out there:

Game certification documents — State gaming labs (GLI, BMM, iTech) require manufacturers to submit full game math docs before approval. Nevada and New Jersey release summaries. These show bonus interaction trees, but they're often hundreds of pages and written for regulators, not players.

PAR sheets — Some manufacturers' PAR (Paytable and Reel strips) sheets have been leaked or obtained via FOIA request over the years. They show probability tables per bonus mode. The Wizard of Odds has documented some of these for older machines.

The practical problem: On machines like Dragon Link, Lock It Link, or Buffalo Link, when the free-games bonus triggers inside a hold-and-spin round, the jackpot determination has already happened at the initial spin press — it's just that the visual path through multiple bonus animations makes it look like the jackpot was "earned" during the bonus. The machine's audit report (accessible to casino staff) will show which base spin triggered it.

For per-machine breakdowns of how bonus stacking interacts with jackpot triggers, the most detailed public documentation I've found is on advantage play sites that analyze specific machines. But I'm not aware of a single academic article on the topic. Most of the rigorous documentation is buried in game certification filings from gaming regulators.

Quote: ChumpChange

But really, these slot players need to learn that it's one player per machine at a time.
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Are you aware of any states that have it written in their gaming regulations, one player per machine?

Are you aware of any article (academic or otherwise) that at least mentions the issue of "which bonus mode caused the win"

Google AI wrote:
Slot jackpots can be split among multiple players, often done through group "slot pulls," but legal ownership typically belongs to the person pressing the button. To divide winnings officially, IRS Form 5754 is used for reported jackpots ($1,200+), allowing the W-2G to be divided among winners. All players should ideally be present.
-Casino City Times

Key Considerations for Splitting Slot Jackpots
Official Splitting (IRS Form 5754): If a jackpot is $1,200 or more, the casino must issue a W-2G. According to Casino City Times, you can use Form 5754 to list multiple recipients, ensuring each person pays taxes only on their share.
The "Spinner" is Responsible: Legal ownership of a jackpot generally belongs to the person who pressed the button, regardless of who provided the money.
Slot Pulls/Groups: Participants in a group pull should have a clear, pre-agreed plan on how to split wins.
Taxes: If you split a jackpot privately, the person who signed the W-2G is responsible for all taxes, say users on Quora.
Casino Rules: Some casinos may be strict about who is allowed to claim the prize, particularly if there are concerns about fraud or underaged players.
-Casino City Times

How to Properly Split a Jackpot:
Use IRS Form 5754: Before leaving the casino, tell the attendant you want to split the jackpot and ask for this form, as discussed in Casino City Times.
Ensure All Participants are Present: The casino will require everyone's ID and tax information.
Use a Group Leader: In a slot pull, a designated leader collects funds and distributes winnings, as detailed by eighteenknots.com.
-Casino City Times

Disclaimer: Tax laws and casino policies can change. Consult a tax professional for specific advice.
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Slot players can be kicked out, banned, or denied jackpots for using another person's player's card, as it violates most casino terms of service. While common, this practice breaches rewards program rules, risking account suspension, confiscation of points, and, in some cases, detaining by gaming officials, particularly if the cardholder is not present.
Key Consequences and Risks:
Jackpot Denied: If a large jackpot is hit, casinos may refuse to pay if the ID does not match the card, particularly in strict jurisdictions like Indian reservation casinos.
Banned/Kicked Out: Security may ban or blacklist players for violating policy, particularly if they believe someone is trying to use a different person's card to access special offers, as noted in this Reddit post.
Confiscation: The casino may confiscate all earned points and close both accounts involved, as discussed in this TripAdvisor thread.
Legal Risk: While mostly a civil matter, using another's card can sometimes involve gaming commissions, especially if it appears to be a fraudulent effort to use someone else's identity.
-Facebook

Although some players use family members' cards, the safest practice is to always use your own card to avoid being banned.
Would you like to know more about how to get a restricted casino account reinstated?