

GitHub is often used as a code mirror, with the actual repo and builds being hosted elsewhere.
Shelter, as in the work profile app? It shows up on Droid-ify for me, and a check of the Links section confirms it’s hosted on a different repo (gitea.angry.im).
Doesn’t every Instagram user automatically have a Threads account now? (Even if they’re unaware of it.)
Meta faking Threads user count that way on top of what’s happened with X user count would explain this “milestone” quite easily.