Usergroup Demotions and Post Per Day Conditional

[ShatterStudios]

I would like to use posts per day in combination with what's already available (post count, days registered, reputation) to decide promotions, and I'd also like to be able to change the comparison types for post count (and posts per day) in the same way that the reputation comparison type can be changed. As it stands, you can demote members if they don't keep up with reputation requirements thanks to the selectable comparison type for reputation, but I want to be able to demote based on activity, too. I'm surprised there isn't already a mod for this, especially considering there have already been requests.