automatic interest or other automatic accounting charges

I see several threads from over two years ago asking Procentive for a way to automatically calculate interest on a past due account or add an auto charge (like for MN care or CC fees). Our clinic has also been asking for this (as I am sure others have as well) for as long as we have been with Procentive. Would anyone else like to see this, what should be, simple feature added to Procentive?