I'm not suggesting productizing but if someone skimmed 0.5-5% off of some of my packages licenses and gave me the rest without me having to do anything I would be happy with that. I think the important thing would be, customers would likely expect less support so licenses should be cheaper.

People who don't want tiered licenses could definitely just mit it and walk away of course.

I do like the idea of paying back the original maintainers otherwise people could sandbag projects to fork them later.