Quote from SjonssonNow of course you could go all Blizzard over the EULA and say 'Hey, we own all your shit you do in our game.' But hopefully it could be more like a partnership.
Have you read Valve's ToS?
Anything created in the SDK is theirs. They are simply providing royalties now. It's definitely the base building for what Source 2 will be. With them announcing it is free and all. Small indies may use this as a platform and modders can use it as a learning ground. But really modding isnt the same as it once was. It's now "indie" with this workshop announcement.