No, you will never get banned, but your bets might be restricted if you are winning ‘too much’. This is an arbitrary number and is usually determined by a casino, although this is a very rare occurrence to begin with. In fact, there are almost no cases when a player has been restricted. Some progressive betting systems in roulette and blackjack, or video poker, can often be sanctioned by a casino and all casinos advertise their products as ‘for fun,’ rather than a serious source of income.