Roger that, will add for you ASAP! More promotions coming soon, we run a lot of promos outside of Bitcointalk but I'll see what we can do in adding some more forum specific ones.
Yeah I have seen a few of the outside-the-forum promotions but then I haven't seen much here in the forum aside from the signature campaign that is actively ongoing at present, but since you already mentioned that you are about to do another form of promotion here on the forum, so let me suggest for you if you don't mind.
The best form of test promotion for your casino is to conduct a review campaign that way, you have many who subscribe to that promotion to be able to be part of the casino after giving their honest reviews about you casino.