i think one way to get interest from players here is to run your sig campaign, if you can. and hire a reputable BM here. you can already see casinos running their campaign and who are those managers.
that will take a big chunk from your earnings but that will be a good factor in changing the interest to check out your platform. however, if not, just continue your active support in the forum.
Do you think that with the current situation of the site (looks like unfinished project), people will be interested to join even if they run a sign campaign? Obviously not, owner needs to improve the site first to make it better so people will be interested to join. Otherwise, forcing themselves to run a sign campaign with the current situation, with what they have now, it will be like wasting money for nothing imo. One thing to bear in mind, sign campaign is not giving a guarantee of earnings/traffic. It is just a way to advertise the site, what is offered to players on the site is more important thing imo.