Then again, not that much code is aware of version control systems (mostly the code of VCS'es themselves and related tools)
He meant "coders". As in: "most coders don't know or use GitHub".
thanks, typo
Undeserved? Wait what?
I think s/he is implying that github's importance is exaggerated by the people who use and love it, and that the number of people not using github dwards the number of people using it.