In this particular example should the bonus given is $200, then the WR can $4,000. Grand Martingale opens doors to more losses by looking at players' luck, where he doubles the bet and adds another unit just in case of a loss of revenue. That said, we know that good losers are realistic individuals. https://hocvienboardgame.net/tin-tuc/choi-lo-de-tai-rikvip-trai-nghiem-thu-vi/