Modern casino slot games are controlled by computer chips and software, and the winner percentages are preprogrammed into the computer software.
Casino slot machine games have RNGs which are eternally generating combos, even when the game is not active.
Running concurrently with the RNG of the casino slot machine game is the pay out rate percent.
The payout % controls just how much the slot machine game will pay, for e.g. the pay out percent could be ninety per cent, meaning the slot machine game will pay out ninety percent of all the bets played, … the casino simply gets to keep 10 per cent.
This is not to say that each and every time you bet 10 credits you will receive nine in return – where’s the fun and thrill in that? Instead, the casino slot machine won’t payout for a while, and then suddenly fire up a hot streak and you might draw the big jackpot.
The pay off percentages will vary between the assorted games and a couple of the notably common casinos, for example Golden Online Casino, which provides a payout of up to 95 per cent!
This means that, in essence, the one-armed bandit takes all the dough played into it and pays it out to a handful of privileged winners. The casino only gets to keep a fairly indistinct % of all the bets made.
The casino slot software controls any part of the machine, from the flashing lights to the rolling of the reels.
When you hit spin on the one-armed bandit, a combination is generated by the RNG which corresponds to the pictures on the reel.