In this example generally if the bonus given is $200, then the WR will be $4,000. Grand Martingale opens doors to more losses according to players' luck, where he doubles the bet and adds another unit if of a loss of profits. That said, we can tell that good losers are realistic members. https://hocvienboardgame.net/tin-tuc/choi-lo-de-tai-rikvip-trai-nghiem-thu-vi/