They did say 15 posts is the maximum.
a maximum of 15 eligible posts will be paid.
Well, we don't know what will happen, maybe it could be like bestchange?

I think it doesn't look that bad since they've prepared the signature and avatar, I agree there's a risk for participating in a campaign managed by unknown newbie, but it just risking for a week right? I guess users who applied in that thread don't mind for that, especially there are many posters aren't campaign right now.