What will determine if the people that were convinced to gamble in the casino will continue gambling there or not is based on the experience they get while they visit the casino. Even if it's not entirely possible to meet up with all the promised rewards, there is something that can still keep some of the players with that casino, and the few among all the new players will be able to get out with great rewards, and they will continue to gamble there and can still indirectly refer others to come.
If the experience of these gamblers are good and they received the rewards easily, they'll coming back to that casino.
But the others that have been trapped into these bonuses and rewards will continue to do and aim with it.
Well, I might be wrong in saying about them being trapped but that might be the case for them.