Post history of a user will say what activity those people do and its like he troll on those casino if he cannot get what he want from them. So I guess those accusation he made doesn't have any credibility since he also did this to other casino.
Post history means something but it's too early for any conclusion. If we quickly jump to a conclusion after reviewing a user's post history, we might have very biased conclusion, it's not good at all.
But if he could able to provide proof that can point out that his accusation is true then maybe sentiment change and people would believe him on what he experience from Shuffle. Since many people say that this casino is doing good I guess those accusation he made here cannot do anything since people will just ignore it.
Let's give him chance to defend his accusation and of course we will also need to see replies and information shared by Shuffle team. In any accusation, we need to get information from two sides, the company and the user. The company has to follow their ToS, that includes privacy protection on their users so they will not release all information of any user.