Correct Roobet seems to lessen their way of advertising here in Bitcointalk and not planning
to add more anytime in the future as even their Signature campaigns are now running with 10 members from 60 regular members
It's pretty common for most casino after some years of launching themselves here. If you remember the likes of Cloudbet, Bustadice,Bitsler etc, they used to have lots of promotions here back in the day but as time passed their activity reduced in the forum.
Now I am not saying every casino follows the same path but sometimes these things happen.
As for the Roobet Casino in particular, I believe that reducing the number of participants in the signature campaign is not evidence of a lack of casino activity, because that would have led to strengthening its advertising campaigns on the forum and not reducing them.
You can interpret what happened as a change in strategy after the casino secured a distinguished position among its competitors advertising on the forum, especially since the signature campaign has been still active for more than three years. (I personally remained a member of that campaign for more than two years before the latest update procedures). Therefore, everyone knows the casino and it is difficult to forget the brand name and logos, without forgetting that the casino still runs competitions during which it distributes generous rewards.