I'm only a GitHub user here, but I believe GitHub to be very transparent on copyright issues. They post the DMCA takedown notices they receive[1] (and the counter notices as well; in a Git repo, of course!) — this was on HN[2] back when Flat UI received a DMCA takedown notice[3]. There's also another page listing the policy itself[4]. As other users have noted however, the repo linked to in the article reads “Access to this repository has been disabled by GitHub staff due to excessive use of resources, in violation of our Terms of Service.”
Given the other posts, it seems there might just be some confusion that needs clearing up; for that, we'll have to see if our blogger posts anything more.