It really is a game that will beat you every chance it gets.
One on the easiest and well-loved cards is Black-jack. For example: WR of 20xB means that gross total bet of at least 20 times the bonus amount should be wagered. https://hocvienboardgame.net/tin-tuc/choi-lo-de-tai-rikvip-trai-nghiem-thu-vi/