Why do some people fork repos but make no changes to them? - Lemmy.World

I’ve seen some projects on GitHub (howdy [https://github.com/boltgolt/howdy] being one of them that came to mind) where there are forks, but when I check the forks out they are either unchanged, or are behind by a few commits. I was wondering why this would happen. It couldn’t be for archival purposes, could it?