I've seen gambling sites before that are rigged to make you win really expensive skins but then make you deposit to withdraw, of course you don't get anything back once you give them your skins..so be careful.
I have experienced a great loss in one of the gaming sites.Now I've stopped trusting these kind of gambling sites.Now there's a great platform called Hostgames that has come up.It's a very promising project.
Winning and losing is just the part of game but when you bet huge amount you lost it but it doesn't mean the gambling site cheated on you,you just becomes over greedy and lost your mind then bet huge amount but if you realize that you are in serious loss then it is a good thing for a gambler and his future.