They did refuse to take it down.
You have no idea how many emails were exchanged, attempts at explaining them what a commit log is, what verified commits are...to just refuse to do anything until Stanford weighed in.
It is incredibly condescending to say "arXiv is not a place for a copyright strike". as if I decided to start one.
If somebody gets robbed in front of a place of worship/whatever, would you scold the victim by saying that's not the place to get robbed?
Incredible.