That situation has been ongoing for years and will probably remain without any form of resolution too. The 1xbit forum representative tried to address the accusations for a period of time updating the thread with information but in the end the number of complaints (genuine and fake) became too much for them to keep on posting about how they resolved the issues, countered them or addressed them.
Some may have withdrawn funds before getting scammed, not all were that fortunate.
Theres been an open allegation against them on the forum for a long time which is yet to be resolved but the company still goes about its business on the forum, opening new signature campaigns as if nothings happened. They are quite untouchable because scams are not moderated on the forum. Its a tricky thing what to believe, @Saint-loup says he was able to withdraw his winnings from the casino successfully, other people may not be so lucky. some of the problems users are having with the casino are partly their own fault of not reading the T&C and the issues are not particular to 1xbit but other online casinos as well. But they have such a bad reputation that it's embedded in my mind that they are not to be trusted. Personally I wouldn't risk using this casino when there are reputable casinos.