I saw this pop up this morning when I woke up and all I could think was...
I'm not that much of a mod downloader as I rarely play PC games but this just sounds like a "How to kill a modding community 101" guide.
I could understand from the modders point of view that he'd like a little buck for his effort, but that can easily be done through donations DIRECTLY to the modder instead of having to pay a hefty 75% of the set price to Bethesda and Steam through the store. That 75% doesn't make it feel like supporting the modder, but makes it feel more like DLC that both Bethesda and Steam did nothing for.