Leroux: IMO the devs from the first tier are much more deserving of getting paid for their game offerings then two thirds of the BTA.
Well, you can always manually decide how much does every dev receive (I do it every time, to reward those devs that support Linux and/or DRM-free versions).
UnrealQuakie: Does the goat simulator come with all the DLC on the DRM free version or is the steam key the one that comes as full game?
According to Grargar's and my experience, neither the Windows nor the Linux DRM-free versions of this game do work, so it's hard to tell for sure (even though the difference in size between the Steam version and the one offered DRM-free mentioned by Grargar is a big hint).
As far as I can tell, the Linux DRM-free version has some directories and files related to the DLCs, so there may be hope.