[JoshTriplett]

That might be true in your recruitment channels, but in general it's a problematic assumption. Many prominent Open Source projects don't use GitHub; in particular, that applies to those large enough and/or old enough to have and maintain their own infrastructure. I've run into that problematic assumption a few times, and it seems worth calling attention to.

[glandium]

However, many prominent Open Source projects that don't use GitHub have mirrors on GitHub, and as long as you star them, they appear in your GitHub profile if you contributed to them using an email that is registered to your GitHub account.

To give examples:

- Git https://github.com/git/git,

- Linux https://github.com/torvalds/linux,

- LibreOffice https://github.com/LibreOffice/core,

- Firefox https://github.com/mozilla/gecko-dev