Currently:
Due to the current system members will join and post 20 times on nearly anything in sight. Even if the thread is a month old. These posts may also consist of low quality junk such as, "I agree." or simple facts which other members had already stated.
Suggestion:
Add a determined amount of join time requirement before being allowed to make any requests.
Ex. 5 days minimum or 24 hours of online time.
Conclusion:
I understand we want this forum to flourish with posts, so the 20 post requirement is helpful towards that goal. So it could be beneficial to add a time limit as well before they are able to request. This will cause them to not only post 20 times, but since they have to wait a determined amount of time they will continue to post.