Denied suggestion on leecher filtering.

No. That's literally telling us to remove our forum from search engines since the part that drives us the most traffic will be hidden.
Also I saw someone mention a timer, that will not work in a million years. Let me tell you how to bypass it:

1. Sign up.
2. Wait x hours.
3. Spam to get your credits

Nothing changes besides an x hour delay.

Denied, though if anyone has a good idea, feel free to create another thread. Discussion about cleaning up the forum and gaining activity that aren't leechers are always welcome.