RB casinos have done little for us and never that big anyway and I put it down to the banned countries list as we have a pretty multicultural mix of visitors.
The poker rooms (prima software) have been getting a lot of action for us albeit the takeoff was very fast (most all poker rooms are slow initially IMHO).
Hopefully the few problems with prima experienced by players (booted for talking about other rooms etc) will be sorted as they will and do convert well. Though player retention will be minimal unless there is a change of attitude on the part of prima, something RB has no control over.