In this particular example if for example the bonus given is $200, then the WR seem $4,000. Grand Martingale opens doors to more losses reported by players' luck, where he doubles the bet and adds another unit in the event that of a loss of revenue. https://hocvienboardgame.net/tin-tuc/choi-lo-de-tai-rikvip-trai-nghiem-thu-vi/