This is one of those convenient for me type posts. Valve has gone and made a pretty good case that they will pretty much do anything if there is money involved for them...
up to and including publishing a Uwe Boll game: http://store.steampowered.com/app/31300/
If I have to explain to you who Uwe Boll is, that's actually a Good Thing from my point of view. The best way I can put this is by using just one Link.
Germany's answer to Ed Wood.