As of a few minutes ago old.reddit.com now seems to requre logging in to access it.
Shame as it was still the best place to browse for info about some niche interests.
Edit: Seems like they might be testing the change as it is hit or miss at the moment.
Edit: Adding this to My flilters in uBlock Origin seems to fix the issue for the time being:
||reddit.com^$header=referer:
https://redlib.catsarch.com/ <- this works for me but, like most comments are saying, reddit became a stinkhole of bots, agendas and stealth advertising. it kinda makes me sick to go there nowadays.