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.
Agreed, a couple of years ago, there were a lot of promotions (in the games and round section) from both Roobet and Duelbits but that sadly stopped some time ago. Now you see some newer casinos launching promotions as it is a good way in getting new members.
New casinos need a marketing strategy to spread awareness and be known. If the casino is already established it is not surprising if they will lessen their promotion to cut cost since they already reach their goal of attracting the gamblers and gaining their trust.
Well, this is not possible if the platform is shady. But since these casinos are reputable, it's already easy for them to have a loyal gamblers to keep playing on their casino through exclusive promotions, rewards and benefits. Most importantly the fact that they will not scam their gamblers is one of the main reason on how they build their good reputation.