Humble isn't a platform, its a supplier to Valve.

Frozenbyte are good people and could use the money. I won't begrudge them taking sweeneybux, should they do it, cos they won't be raging cunts about it. My only concern is whether the market can endure the long-term damage of Sweeney paying for people's copies.

Frozenbyte offered whole Trine series drm-free on Humble and it's probably going to do it again.