I can certainly understand the sentiment, but requiring a Github account still seems arbitrary and limiting. There are lots of great open-source developers who don't use git or github.

For example, I'm a ruby developer, so yes most of the open source development I do involves Github. But even I know about (and use) projects like zip-ruby [1] on Bitbucket or redmine [2] on svn.

[1] https://bitbucket.org/winebarrel/zip-ruby/wiki/Home

[2] http://www.redmine.org/