The one beef I have with the "my github page is my resume" meme is that many developers work in spaces where they do not have the ability to work with open source much. I personally have years of work checked into github in private repos, and if I showed it to a potential employer I could be sued into oblivion. Many of us work on very sensitive systems with loads of legal walls around them. Sure, I contribute to OSS in my spare time, but my public github profile is not even close to a fair representation of my professional work.