You might be surprised to learn this, but casinos don’t like to lose. They especially don’t like to lose to skill players, those players who are adept at counting cards, signaling, and various other perfectly legal techniques that mitigate the house advantage. In the old days, players caught employing these techniques were often taken to a back room and beaten before being thrown out. Nowadays casinos just blacklist them and refuse to pay them their winnings. This is the guy who rights those wrongs.