Most active GitHub users (git.io/top)
The count of contributions (summary of Pull Requests, opened issues and commits) to public repos at GitHub.com from Sun, 06 Jan 2013 11:55:03 GMT till Mon, 06 Jan 2014 11:55:03 GMT.
Only first 1000 GitHub users according to the count of followers are taken. This is because of limitations of GitHub search. Sorting algo in pseudocode:
githubUsers
.filter((user) -> user.followers > 233)