I disagree with the push for newbies to overshare on Github. Some of the code I wrote when I was learning how to program in middle school was completely awful. I'm pretty happy that it's not used as a representative sample of what I am capable of today.

It's one thing for a recruiter to say "hey, I saw you have a GitHub account..." It's quite another when the recruiter forwards your profile to a seasoned engineer and they make a DailyWTF post out of your code!

Also - you've received offers out of the blue, do you mean offers to interview, or offers to just join the company w/o interviewing?