I just looked at the rules on "the other" forum. I believe they are on the same forum software, at least it appears so. They specify a tiered system but I don't know if it's automated or manual.
2 concurrent per user.
10 concurrent per site supporter.
25 concurrent per forum sponsor (vendor).
Software is vBulletin 4.2.2
Major casting forum:
Max of 3 ads may be listed/open per month.
Current ads must be completed and closed before the new ads next month.
Max of 5 items per ad.
Casting related items only.
Many other rules.
Does not apply to vendors sponsors. $100 per year and must be vetted and approved.
Software is vBulletin 4.2.2
I could get behind something like this.
First stop would be increasing the minimum post count to a number that is not even possible to perceive it as "runnable". An idiot looks at 50 and says "I can quickly make 50 posts and nobody will be the wiser." Bump that to say, 150 or 200, and suddenly you must be someone who is a supporter, whether monetarily or through quality posts.
I'd also like to see a post to ad ratio of some kind. Numerous guys out there that hit 50 and never leave the classifieds again.