It's almost 1 years I have been using this casino site(Roobet.com) and until now firmly OK with their service. I can guess, Most of the user obviously express same story. I can understand this ANN Thread missing any responsible representative but heavily active on various promotions. It's their strategies how they management however Bitcointalk community has right to get solution over any concern through this forum. I could be wrong however this is the means by which I can describe.
This has been talked before, bitcointalk is not the biggest place in crypto to get or find customers. In fact telegram is growing to be the bigger one and I imagine there are way too many telegram community managers than bitcointalk signature or bounty managers, because everyone can grow bigger there with some hard work, whereas it is limited here.
This is why roobet may have moved the resources from here to there, or somewhere else. I mean sure it is just one person who already has a ton of work, adding bitcointalk messages here and there, instead of just announcements once in a while, they could come in here and talk about something once a day, even one message per day would be a big deal, not like that would take time, maybe 5 minutes at tops.
However even with that idea, places like roobet prefer to keep it professional and that is why they focus on other places and not just give half-interest here which would be bad looking.