All of those scam accusations are regarding big amounts of money (5-300 bitcoins) and from what I understand they are trying to solve the problem even though I don't think they will ever pay someone who won 300 bitcoins.
If you are just a small gambler and you deposit only a few hundred dollars, maybe a few thousands then you will be OK with withdrawals. But still, a good gambling website will pay its clients winnings regardless of the amount. So better stay away