Actually, the Linux kernel, Android, and Apache are all on GitHub, and were analyzed (though the latter two are mirrors, so I guess not purely on GitHub.) For

Actually, the Linux kernel, Android, and Apache are all on GitHub, and were analyzed (though the latter two are mirrors, so I guess not purely on GitHub.) For projects like Linux, while it may have 3500+ contributors, it got that way over 23 years. We also made the assumption that due to the social nature of GitHub, its meteoric growth, and the visibility that it brings open source projects, the fastest growing open source projects are on GitHub. We presume this assumption is correct, but don't have the data (or even know where we could get the data) to verify it.