I have no idea how right the author was about how Nord got ahold of the residential IPs. I was able to recreate the technical results, and noted at the time that the OpenVPN connection to the same Nord endpoint behaved differently (and, indeed, Disney+ blocked it).

Of course, that was a while ago .. long enough I assume my notes no longer reflect the current state of things. It'd be interesting to try and recreate it with the latest stuff, but all of my VPN providers accounts have lapsed by this point.