If the casino's blackjack rules are bad, you may not be able to take advantage of it.įor example, in a casino that does not accept double after split, the house edge increases by 0.20%. you need to pay attention to some points. If you do perfect basic strategy and card counting at the same time, this gives you an advantage of 0.50% to 5%. In fact, the only game where we can make money at the casino is blackjack (against home.