Full source will be up on Github (with possible exception of any code that needs to be secure like server stuff). It will get leaked/pirated anyway, so not going to bother charging for the source.
I understand if you just don't want to deal with commercial licensing and developer support. But really, regardless of if your code is leaked or not you can get royalties the same way Unreal does on commercial products that use it.
Yeah there will be some sort of license in place although I hope to one day have it under permissive open source. All I mean is that I'm not limiting code to people who have purchased the game. :)
