If the intent is to be critical of notch, I can't see any fault in his saying he hopes to release source code eventually and that since the GPL is such an anti-freedom license (huh, actually my words not his, but my sincere interpretation and agreement with his 'draconian' term usage), he "might just possibly" release as public domain, which means completely unencumbered and free. That sounds pretty cool. He's not under any obligation to do so though, and I don't see that many other games sold on Steam are somehow better.
Or perhaps you meant to indicate that you think his true reason not to release on Steam is not what he said, but he is lying and the secret real reason is that he intends to release public domain, and for some reason Steam would not allow that after signing their draconian and freedom limiting contracts, that are as freedom limiting as the GPL.
Maybe. Don't know because your post was incoherent.