[derefr]

I think you're both looking at this the wrong way. The projects that "wither or stagnate"? Without Github, they likely wouldn't be publicly-accessible at all. The professionals will always produce professional code, the amateurs will always produce amateur code, and what Github did was to make the amateur code accessible. You can't make the amateur code into professional code, but that by no means translates to it being valueless. You just have to recognize it for what it is.