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.
Big gambling websites will not risk their reputation just to SCAM users with few bucks depisited in their accounts, they will focus on big players.
IIRC, the 338
BTC accusation was solved.
But still, a good gambling website will pay its clients winnings regardless of the amount. So better stay away
It is a matter of priciple, if you believe they scammed someone else, you should avoid dealing with them even if you are 100% sure they will not do the same with you.
I also have seen similar cases against Cloudbet and Nitrogensports. I am not sure why reputable sportsbook should risk its reputation for an amount less than weekly turnover(my guess).