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:
There are plenty of communities and topics for them and what not, but engagement is the problem. There’s no one here and most of the people here are here because even reddit didn’t want them. This place is insufferable at times.