It's laughable that some people in BitcoinTalk actually believe that a reputable service such as Shuffle is deliberately trying to take coins from their own users. They actually would believe that a random person, with a brand new account, and with an unknown identity to be the honest one in the issue.
There's always the possibility of a false-positive, but the service is NOT deliberately taking your coins.
That's an old scenario when they can exploit the site and their accounts are suspended then they will create new accounts just to ruin casino reputation unfortunately this method is no longer effective in the forum. Just look recently our friend hit big win here and withdrew around $14k and he got it. Indeed, there is a delay in withdrawal few hours but that is normal as a security especially if it's the first highest withdrawal. It is logically impossible for a casino to scamming user for just $5 or less than $1000 while casino revenue is more than that in one hour.
It cannot be ignored that crypto casinos and new casinos are always the target of exploits and the most vulnerable is sports betting especially Esports, recently I heard of this gang who are looking for casino accounts with high level, they are willing to pay up to $1000 if the account has the max bet feature.