Modern casino slot machine games are controlled by a computer, and the win %s are preprogrammed into the computer software.
Casino slot games have Random Number Generators which are eternally generating combos, even when the machine is not currently being played.
Running in unison with the RNG of the casino slot machine is the payout percent.
The pay out percentage controls how much the slot machine will pay, for e.g. the payout % may be ninety percent, meaning the one arm bandit will payout ninety per cent of all the wagers played, … the casino only 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 thrill in that? Instead, the casino slot machine game just won’t pay out for a while, and then suddenly hit a hot streak and you might hit a big jackpot prize.
The pay off percentages will tend to vary between the a variety of games and a handful of the notably common casinos, such as Golden Online Casino, which provides a payout of up to ninety-five %!
Thus, in essence, the slot machine game takes all the $$$$$ played into it and pays it out to a number of privileged winners. The casino only gets to keep a relatively tiny % of all the odds made.
The casino slot software controls every part of the machine, from the flashing lights to the rotating of the reels.
When you hit spin on the slot machine game, a combination is put together by the RNG which corresponds to the pictures on the reel.