Let's go back to 2004 when MovableType announced licensing changes and more importantly, pricing changes. The mass exodus to WordPress ensued! https://web.archive.org/web/20050216134428/http://www.sixapart.com/about/corner/2004/05/its_about_time.html

Will the same thing happen to GitHub as hundreds or thousands flock to competing services or host their repos themselves on a VPS? Tune in in a few months to find out.