I concur, and the biggest challenge I see, in this case, is the regional one you cite. Happily it's relatively easy to resolve for 99% (a number I just made up

I concur, and the biggest challenge I see, in this case, is the regional one you cite. Happily it's relatively easy to resolve for 99% (a number I just made up) of these 80% of github projects that lack licences -- by either opening an issue, or emailing the author, and seeking clarification. In defence of these unnamed persons, I suspect that if you're about to work with a project that hasn't fielded this type of query previously (and resolved it within their repo) then you're in some troublingly unchartered waters on at least two fronts.