Github has this download link on the repositories. How can I add binary distributions to this list?
I cannot find any info on help.github, so a link to some document
The download link is first meant for git archive.
As Holger Just point out in his answer (upvoted), you can add "a new download".
See the blog post "Nodeload2: Downloads Reloaded" for considering all the troubles they have with providing that one service:
Nodeload is what prepares git repository contents into zip and tarballs.
Essentially, we have too many requests flowing through the single nodeload server. These requests were spawninggit archiveprocesses, which spawn ssh processes to communicate with the file servers.
