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.
It is funny to not trusting gambling sites just because you lost too much money. There are many other important aspects to be used such as provably fair system, reputation, etc to decide whether or not you trust the site.
If you stop trusting gambling sites because you lose your money, then simply dont even ever gamble.
It seems that you try to encourage people to leave gambling in bitcoin casinos and move to the project you are talking about. Once the project alive and you are able to gamble your money on it but unluckily you lose your money. What will you say? Not trusting them as well?