“He played video poker. Depending on the game the payout ratio is anywhere from 93% to 100%. “
Your link is to online games. Casino machines in Vegas run from 97% to 99.8%.
Video poker is unique in that you can make or find a little strategy card before you ever sit down that will tell you how to play almost any hand you see. For a lot of the games, you are indeed in the 99+% range.
Here’s the sheet for basic video poker, for example:
https://wizardofodds.com/games/video-poker/strategy/jacks-or-better/9-6/simple/ (”simple”)
https://wizardofodds.com/games/video-poker/strategy/jacks-or-better/9-6/intermediate/ (”intermediate”)
Video poker is absolutely the very best game to play if you want to get a lot of “comps”. Nobody’s going to throw you out for “card counting”; you can sit at a machine for hours and nobody cares; the math of something being a 99+% game means that you don’t see long extended winning streaks or losing streaks. The “comp” is based on how many hands you play, not whether you win or lose.