The traffic that they can get through the forum is quite good and their players can also reach them out through that ANN.
Yup, that's true, however, they need to stay legit because their account might get red tag and that would affect their reputation which could be a reason that their gamblers will leave.
This forum will help the exposure of the project but we have DT members here who would protect the gamblers if abused and that is the advantage of being here.
Since I'm not really aware about the existence of that casino, as long as they won't go against the rules of the forum they should be fine and no scam accusation against them.