The FIRST word of that entire sentence is what? “DEVELOPERS”. It’s not the developers of the addon doing it! Its a third party company doing it, who made a website with the same name as the addon. The ToS says the Developer can’t. It doesn’t say a thing about anyone else selling things for someone else’s addon. Weakaura does the same exact thing with their paid weakauras like Foji’s. The Developer of Weakaura isn’t selling anything, it’s a third party who created an import script for weakaura and sell it.