I think there is a difference between the casino owner and the one who controls the chances of winning and the players. There is a difference, and it lies solely in the integrity of the casino owner.
I am sure that many physical casinos in small towns absolutely shamelessly rig their Slots to the lowest chance, which is not subject to any laws about what the chance should be on slot machines. They just put the lowest that there are.

The casino owners and the game owners must have a trick in their hands. They will give a part of their profit to a gambler so easily, but it is not that easy. Especially, in some secret places where there is less police or legal trouble, the casino owners reach their own decisions, who to give the win to, who not to give it to, it is under their own control. In many gambling boards or casinos, a gambler wins, but even after winning, he cannot easily take his money out of the casino. The casino owner puts some goons behind him. So that they can snatch the money he has earned from his hands.