Modern casino slot machine games are controlled by computer software, and the win %s are preprogrammed into the game software.
Casino Slots have Random Number Generators which are constantly generating combinations, even when the game is not currently being played.
Running simultaneously with the RNG of the casino slot machine game is the payout percentage.
The payout percentage controls how much the slot machine game will pay, for example the pay out percent may be 90%, which means the one arm bandit will pay 90% of all the bets played, … the casino simply gets to keep 10 percent.
This doesn’t mean that for every time you bet 10 credits you will receive nine in return – where is the fun … exhilaration in that? Instead, the casino slot machine game just will not pay out for a little while, and then suddenly jump on a hot streak and you might catch the big jackpot.
The profit percentages will definitely vary between the various games and a couple of the highly common casinos, for e.g Golden Online Casino, which tenders a pay out of up to 95 percent!
Thus, in essence, the slot machine game takes all the funds played into it and pays it out to a number of privileged winners. The casino only gets to keep a averagely tiny per cent of all the bets made.
The casino slot machine software controls each and every part of the machine, from the flashing lights to the turning of the reels.
When you hit spin on the slot machine, a combination is formed by the RNG which is linked to the pictures on the reel.