It depends on the players you bring.
Hobby players who play slots do very well on the wager system, and their wins don’t get deducted. Slots are usually played for a long time, up and down and up and down. You make money on the bonus, too.
A blackjack player who comes in and plays a few hands, wagering larger amounts, and just tries to see if he can win on the quick, these are not good on the wager system.