I just googled the return percentage of online casinos and saw different percentages that doesn't seem real. A slot machine can be written to pay out 98%, but its programmed to pay 90% and it's publicized that way to attract more people to play using that slot. Though one slot could be paying out that amount in the casino, yet my point is that no casino offers 100 percent payout that means if a slot pays out 94 percent for every 100 dollar bill spent on that machine the player losses 6$ to the casino. That is if you play longer times you'll lose, and we can almost never stay atop of the slot machines after long period of plays, unless you win a jackpot. Even if you win a huge amount, you can lose. They are numerous stories of people who won the jackpot and ended up spending the whole money back on the casino within a short period, 1 or 2 years, they lost the jackpot.
Isn't it?
The thing is, if you're attracted to playing slot machine type games - you've already lost. The percentage that they let you win is almost irrelevant because people get so "in the zone" that they have a tendency to keep playing until everything is lost. It is basically a game for losers and nobody with any sense should really be playing them. It's fine if you want to drop a dollar or two on ten cent spins, but any more than that and it's an exercise in futility. Keep in mind that a casino will intentionally program their games to show you a few wins in the first 10 or 20 spins, but then their normal algorithm will kick in to take it all back from you. There are much better ways to make money.