This scammers are luring players with a rewards that doesn't exist. For example, they have a reward of 250 usdt, you need to play a lot to win this. Once that you win 250 usdt, you find out that you actually won 2 usdt, the rest is just non existent. And they took 0.95 usdt on withdrawal, so that means that you won 1.05 usdt from 250 usdt reward. 

If this is not scam, I don't know what is.