That's the reason I usually don't deposit my money in any new gambling sites. Better only gamble on reputed site which already many experts verified their bets and proven safe to bet. In gambling any way we need only luck to win apart from that if casinos cheat then you will never see any winnings in gambling.
But how can you know if their site is reputable or not if you never deposit? You should at least try and play there to make sure that they are really reputable or not. Some people try to bring X site down by doing this kind of thing though. So we can't believe on some reviews too sometimes
There are really some reviews that people do only rely on others opinions which means its not accurate on rating a particular website directly without any valid proofs. Some reviews are just based on their own view and opinion or add up on others comment,just like that. Trying out is good but just risk only a small amount so that you wont regret if you do experience problems ahead.