If I could do that then I would have done it a long time ago, but unfortunately, I dont have the kind of ability, or rather, this forum doesn't have that kind of option.
I could lower the post count rule down to five posts, and then keep making it so that the amount of posts you need goes up every week, but that would be a hassle that could potentially cause a bunch of problems.
Could you instead drop ALL post counts to zero about twice in week, and have count rule to 1 or 2 posts?