The first time I saw people use member cards for slot games, I didn’t know what they were. I asked the man sitting next to me and he explained a few details about the rewards club. But he wasn’t using a card himself.

When I asked him why, he said he once had a card but stopped winning when he played with the card. He thought the casino was monitoring his playing and adjusting the slot game results.

This rumor has circulated both online and offline for many years. It’s normal for people to hear something repeatedly and wonder if there is truth to it. But I’ve never found any proof that casinos can change the way slot games play by flipping a switch.

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What makes it difficult to combat this idea and other rumors about slot machines is the many different markets where you find them. Slot machine games are regulated by each country. Complying with different regulations may mean that a slot maker must change how its games work.

One of the most difficult casino urban legends that goes around is that the casino is tracking what you’re playing and adjusting the odds on a machine, or they raise/lower paybacks based on time of day or during special occasions. Status: Very, very unlikely; in most cases definitely not, anyway. Slot Machine Basics. Some casinos will offer you a no-deposit bonus when you sign up, while others will have a deposit bonus. All of the casinos are mobile ready, with dedicated apps and you can choose between free and real money games. The list of casinos below feature 50+ slot machines, blackjack, roulette and baccarat. There are a few progressive slots on hand. All slot machines are very tightly regulated and controlled. Even the networked machines. Before a casino can change the odds or payouts, the machine has to have been idle for a specified period of time and the change must be logged and reported. Older machines can only be changed. Slots machines, as games of chance (rather than skill), are generally more about having fun than they are about making money. However, there are things you can do to maximize your wins and minimize your losses. For example, by calculating a slot machine’s payout percentage, you can obtain a larger picture idea of how much money you stand to win back.

The clearest example I can give is how slot games are decided in the United States. Class II slot games decide the outcome on the basis of one random number then configure the display to match that result. Class III games use several random numbers to control the reels.

How Modern Slot Machine Games Work

There aren’t many physical slot games left. They’re all electronic now, and the electronic machines use random number generator chips to decide results.

But there is more involved than just generating a random number. The “slots” in the slot games are spaces on reels. The computers now simulate these reels.

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Former and current slot machine manufacturing employees answer questions about game design on several websites including Quora. This answer was posted in September 2014, and it explains how the simulated reels are managed by software.

The programs to simulate the reels and assign the random numbers are etched into ROMs, Read-Only Memory chips. These ROMs must be physically changed by a technician to change how the game payout percentages work.

Legitimate Online Casino Operators Lease Games From Service Providers

There are over 2,000 online casinos. It’s impossible to be sure about how they all manage their slot games. But what is known about the most popular casinos is that they don’t run their slot games from their own servers.

Instead the online casinos lease game services from secure data centers. These gaming platforms are run by companies like Blue Ocean and EveryMatrix. Some of the game design companies also run their own servers, leasing resources to online casinos.

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Although it would be simple for online gaming companies to switch things up, they would risk losing independent certifications if they allowed the games to be rigged.

There’s no need for casinos to adjust the percentages. They can order the percentage breakouts for house edge and return to player that they want to offer. This way, they maintain competitiveness and support long-term profitability.

Many Games Publish the Theoretical Return to Player

Some slot games include the theoretical return to player in their help screens.

If the players see that RTP has been adjusted downward, they can play elsewhere. If players only suspect that the RTP has been adjusted without proper notification, they might still leave.

Casinos need players. The best strategy to grow their customer base is to keep game rewards high enough to make the risk worthwhile.

Some Governments Regulate Return to Player Percentages

Licensed gaming casinos must comply with local laws governing their businesses. Some countries provide more regulation than others.

In the United States, commercial land-based casinos are regulated by their states. However, Native American casinos are mostly regulated by the tribal governments that own them. Each jurisdiction has the authority to set minimal RTP percentages to ensure the casinos don’t make too much money.

The 1988 Indian Gaming Regulatory Act creates the legal framework used by tribes to protect their traditional gaming activities from state regulatory laws. The act also defines the three classes of gaming and how they are to be regulated.

Class II games are regulated by the tribes but only in states that allow any kind of gaming. Only Class III games are subject solely to state regulation.

True slot machine games are Class III games. Native American casinos offer Class II bingo games that are made to look like slot games. The game cabinets must display the casino bingo games that are used to determine wins.

Class II slot machines may have reels and bonus games but they’re not really slot machine games as defined by federal law.

How Do You Determine the Odds That a Slot Game Pays?

Casinos may or may not be required to declare the return to player for their slot games. Some casinos place a plate or sticker on their slot games with a notice. Other casinos leave it to the game help screens (thus, the manufacturers) to inform players.

The games’ odds may be reported as a theoretical RTP percentage, but they could also be reported as a ratio, similar to the way lottery games declare chances of winning a prize. Either way, these games don’t have to tell you how often to expect to win a prize of any amount.

Some players merely judge the looseness of slot games by how much money they win or how often they win as they play the games.

Some players judge the looseness of slot games by how popular they appear to be. This observational strategy assumes that the crowd knows more than the individual.

One of my friends tells me he only plays slot games with low jackpots. His reasoning is that players need to lose less money for someone to win $10,000 than for someone to win $20,000.

Slot Machines May Have Programmed Payout Limits

In another post on Quora from 2016, someone claimed to have industry experience in the Caribbean.

In his post, he said that a machine won’t pay more than it has accumulated after the first month of operation. That first month establishes the limit based on the profit the machine made.

The system is designed to be random within a range of percentages. The software decides when and how much to pay but won’t go over the monthly limit.

It should be obvious that this limit could be reset.

The Games Are Designed to Be as Random as Possible

People who design and repair slot machine games express much trust in the random number generator chips these games use. The RNGs, as they are called, use the latest available algorithms at the time they are manufactured.

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Math has not yet progressed to the point where truly random numbers can be generated. Mechanical devices require input from an outside source to be truly random.

The way slot game designers handle this limitation is they design the chips to generate thousands of random numbers every second. The random numbers each take a turn at being available for use by the game.

Because of the percentage payouts and internal limits they use, slot machine games don’t have to be reprogrammed to improve casino profits. Everything is designed to run with as little intervention as possible.

And that is better for the casino because the more they can intervene in a game’s function, the more likely they’ll face regulation over that intervention.

Casino game techs often say that replacing chips in slot machines must follow a special procedure (in the United States). They are closely monitored and every part must be accounted for. So, it’s less expensive for casinos if they don’t tweak the games.

Conclusion

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An honest casino doesn’t need to control who wins at a slot game. They already control who can play a slot game. They can ask anyone to leave for any reason.

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Naturally, casinos don’t do that. Instead. they purchase gaming systems that are designed to create an entertaining experience for patrons while legally retaining a profitable percentage of wagers.

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No matter how much one’s frustration tempts a player into wondering about Big Brother Casino tweaking the game, it’s more profitable for the casino to let nature take its course.