Modern casino slot games are controlled by computer software, and the winning %s are pre-programmed into the software.
Casino slot machines have RNGs that are eternally generating combinations, even when the slot machine is not active.
Running side by side with the RNG of the casino one-armed bandit is the payout percentage.
The pay out % controls just how much the one-armed bandit will pay, for eg the pay per cent might be 90%, meaning the slot machine will pay out 90% of all the stakes played, … the casino gets to keep ten percent.
This does not mean that for every time you bet ten credits you will receive nine in return – where is the fun … fascination in that? Instead, the casino slot machine game just will not pay out for a while, and then suddenly jump on a hot streak and you might draw the big top prize.
The payout %s will definitely vary between the various games and a few of the very popular casinos, e.g. Golden Online Casino, which provides a payment of up to 95 percentage!
Thus, in essence, the slot machine game takes all the money played into it and pays it out to a couple of chosen winners. The casino only gets to keep a generally small percent of all the stakes made.
The casino one armed bandit software controls each and every part of the machine, from the blinking lights to the spinning of the reels.
When you hit spin on the one-armed bandit, a combination is developed by the RNG which associates with the pictures on the reel.