Maybe I'm not understanding your point... you only pay if you want to use it in a closed source capacity. The alternative (just a vanilla copy-left license) wou

Maybe I'm not understanding your point... you only pay if you want to use it in a closed source capacity. The alternative (just a vanilla copy-left license) would mean it's simply impossible to use in a closed source project at all. So if all you do is write open source software, there is no difference for you. And if you write closed source software (or some project/client suddenly requires it of your for some reason) then you have something you can do. It seems like a win-win?