[imtringued]

I use the AGPL for user facing applications. I personally have nothing against someone taking my project and improving it as long as the project stays opensource. If they somehow manage to turn that into a business model it's fine too but what I have seen is that companies use their resource advantage to destroy the original project if it is permissively licensed.

With libraries it's obvious that you are doing it for the benefit of application developers and most of those are proprietary but they are not competing against you, they are collaborating. Therefore a permissive license for libraries is a much better choice.