Card counting is an advantage gambling technique that allows players to get an edge over the casino in a game of blackjack. However, even though this is not considered outright illegal, it is causing the casino a loss, so there is a chance that the player might get thrown out if they are caught. However, video poker is a game that provides an RTP greater than 100% in some cases. The casinos themselves know that they might lose money, so the player will not be thrown out for winning a lot of money.