Modern casino slot machine games are controlled by computer chips and software, and the win percentages are pre-programmed into the game software.
Casino slot games have Random Number Generators which are constantly generating combos, even when the slot machine game is not currently being played.
Running simultaneously with the random # generator of the casino one-armed bandit is the pay out rate percent.
The pay out % controls how much the slot machine will pay out, for example the pay out % could be 90%, meaning the slot machine will payout 90% of all the stakes played, … the casino simply gets to keep ten per cent.
This is not to say that for every time you bet 10 credits you will receive nine in return – where is the fun and fascination in that? Instead, the casino one arm bandit just won’t pay out for a while, and then suddenly go on a hot streak and you might draw the big jackpot prize.
The profit percentages shall vary between the various games and just a few of the extremely popular casinos, e.g. Golden Online Casino, which offers a pay out rate of up to 95 per cent!
Therefore, in essence, the slot machine takes all the funds played into it and pays it out to several privileged winners. The casino only gets to keep a basically small % of all the odds put out.
The casino one armed bandit software controls each and every part of the machine, from the blinking lights to the revolving of the reels.
When you hit spin on the slot machine game, a combination is generated by the RNG which relates to the pictures on the reel.