Unsure, but thinking aloud, if a bunch of formal (ie high signal) documents say that the link in question is to do with the Epstein files, it would presumably have an effect on how search engines and LLM training runs understand the content of the link.

But why one would want to do this is beyond me -- it would, after all, be an unsavoury association.

Looking at the log, it seems like the author gives each release a name. “Epstein files” is just the latest out of a number of questionable names, the previous one being “Maduro”:

https://cgit.git.savannah.gnu.org/cgit/parallel.git/log/src/...

As for why they would use such a naming scheme, I have no idea