[mbakke]

So selling GPL software is unethical, but selling proprietary software is? That's an unusual point of view!

I don't have WP experience and don't understand what "splits up the repos which messes with the upgrade structure" means. I can sort of understand the argument that not buying a new license can prevent upgrades, but, I still think it's within the spirit of the GPL. As a user of said plugin, you can choose to make the necessary changes yourself (or hire someone for it). Or look for a gratis alternative.

To me it sounds like the GPL is doing exactly what it was designed for.