Why? I've been a coder for 10+ years, dont have a github account. Never used git. All the enterprise projects I work on chugg along just fine on local source control servers of various flavors (CC, Mercurial, SVN, etc...)
This. I have a github account, and when I wasn't working as a developer, it was more active. Right now, all my code contributions go to closed, company-hosted repos. I'm coding more now than I was before, but you won't find any of that on my github. It's the -- possibly unfortunate -- nature of private industry, but that should be a surprise to no one. Sure, I'd love to work somewhere that lets me contribute to FOSS projects during my work day, but that is a much smaller subset of all jobs that involve software development.