Valve is also in the business of selling virtual hats. http://www.joystiq.com/2010/10/21/user-created-tf2-items-bring-in-up-to-47-000-for-some-steam-mem/ http:

Valve is also in the business of selling virtual hats. http://www.joystiq.com/2010/10/21/user-created-tf2-items-bring-in-up-to-47-000-for-some-steam-mem/ http://www.joystiq.com/2010/10/21/user-created-tf2-items-bri... Judging by how much they pay out, TF2 virtual goods are a profitable side business for Valve.