I do agree that gambling board is full of members that have no idea about topics they are talking about but that's solely on signature campaign managers and their rules that force people to write there.
'solely' on campaign managers? I wholly disagree with that, these campaigns are gambling casinos, and thus they would want their signature shown in the gambling area of the forum, i see absolutely nothing wrong in that; if you notice, signature campaigns that aren't related to casinos/gambling do not make any rule of a certain number of posts to be made in the gambling section.
If you are to blame anyone, then it should be the users who spam and not the CM or the campaigns, and mind that most campaigns only require about 10 posts to be made in the gambling board and that is not too much for users with understanding of what they are writing. And imo i do not think users are 'forced' to post there, they applied for the campaigns themselves even after seeing its rules requires gambling posts, so that simply means they are accepting to make the required post them and should do it constructively.