Another Rival player eh
Seriously, I have found quite a few casinos where the bonus offers mysteriously, and often suddenly, dry up when you win. I have found a few others where they knock you down a level after the first surge ahead, and kill the bonuses althogether the next time you win.
There are some that will even bonus ban overall LOSERS, greed perhaps, losing, but not fast enough for their liking.
In most cases though, the more you are down, the better the bonuses. This reverse logic means that players are inticed to play MORE where they are LOSING, than where they have merely BEEN LUCKY enough to win (assuming the bonuses have been properly designed to give a long term edge to the house). Casinos that bonus ban players simply for BEING LUCKY lose the chance to get it back over the long term, which mathematics proves they surely will (all things being the same).
Many operators don't understand these concepts, and are too quick to assume "bonus abuse" MUST be playing a part in the gameplay of a player that wins, even though in many cases it is purely down to luck. The luck argument is no more clearly demonstrated with SLOTS, where a player can come out ahead overall one ONE rare lucky hit, which has NOTHING to do with bonuses (other than perhaps making the resultant net win LESS because there would still be WR to complete).
Where players play "advantage" games such as Blackjack, the logic of the casino is easier to understand. BJ has a low edge, and low variance, so a player using small bets, or big bets followed by small bets, has a very good chance of beating the casino. Getting ahead only shows the casino that the player is clever enough to operate the relevant strategy, so they get bonus banned. They would be unlikely to win the money back from the player by continuing to offer the bonuses.
Many bonus now exclude obvious advantage games like Blackjack, and quite a few are slots only.