Even if there is only a single "post open" package which gets the full 1% of the rev share, what about one developer which contributes a whitespace or spelling fix, versus another developer which contributes a key part of the package? What if one developer contributes a huge number of lines of code, but it's for a feature which isn't actually used at all by a particular billion dollar use case of said "post open" package?
The devil is really in the details.....