People have a big choice of casino to play. But it is necessary to remember that first of all casino pays money for itself and then to players.
it doesn't work like that, casinos operate with a house edge, so they will win in the long run. Put yourself in the gambler's position and you will understand that you have more losses than your wins, in opposite, that' what the casino enjoys.
To make it simple..
Casino pays Gambler A with $200, and casino win from Gambler B by $300, they are still at profit by $100. So if we really want to be in the profitable side all the time, we should be a casino, or invest on a casino if possible.