[dllthomas]

This seems a good example of the actual original meaning of "the exception proves the rule". The fact that he specifically states an intent for it to be free in those cases implies that he does not intend for it to be free more generally.

Coupled with the fact that you automatically have copyright on copyrightable works, and that by default you need license to copy copyrighted works outside fair use and similar exceptions, I think it's clear that if these mazes are copyrightable and if the maze wasn't independently generated (both of which seem more probable than not), then Kraft owes him some money here.