DatDrummerGuyYep, he refused because he has narcolepsy and IBS. That's really sad. He could practically save TF2, he's an absolutely incredible, smart and fast coder.
Imo they could hire him and let him work remotely from home so he doesn't have to worry about that stuff. That way he could be able to do what he's been doing for years but now get paid for it, and Valve would actually have a TF2 dev who knew what they were doing. Win-win.