- Minimum 5 OP posts (Meaning threads created) every week.
- Minimum of 5 constructive posts on the first page of a thread.
- And an additional minimum of 10 more constructive posts up to the third page of a thread.
So you're looking for sixteen people to create between them a total of 80 new threads (every week) and then keep coming back to those threads week after week to effectively necro bump them if they are not popular. (Mods delete posts if the same poster posts days apart without any other poster participating, so you'll end up with participants posting "quality" posts only to have those posts deleted because no one else has posted.).
Ad visibility/exposure. If a topic takes off most people won't browse through all the posts, and regardless of the topic length, the first 1-3 pages are more likely to be seeing more views. Participants of campaigns with such rules can expect to be watched closely by users and mods alike.
Might want to re-think how your campaign is conducted.