No doubt many successful casinos in Bitcointalk because they can running the campaign very well. I agree that casinos need to find which promotion that will runs good for them. But signature campaign is the most campaign that many casinos use to attract people attention.
A well run campaign can generate good results for the platform because as long as the campaign runs smoothly, many members of the forum will be interested and they end up doing their part really effectively.
You're right, but there are definitely very few campaigns that run smoothly. In my opinion, it also depends on the casino's policy and the manager. If the casino is doing well and the manager runs the campaign professionally, there's no room for mistakes