Valve has shown that they can build up a fully-fledged hat-economy, but what they haven't showed is the ability to properly managing people's creative content, especially content created and submitted by enthusiasts. Steam Green-light might be the most recent, and perhaps most disastrous example, but the oversaturated mess that is Early Access is another one.
If this turns out to be another poorly managed, screw-up that ends up inadvertedly hurting the modding community, question is how much longer all that goodwill is gonna last.