I think bitL is saying that reddit embeds some sort of tracking script in “soon-to-be-banned subreddits” that they don’t embed in normal subteddits, and that you can tell this from notifications within Tor

Just do what I said and observe Tor browser.

I'd noticed it first when they put r/watchpeopledie under a review, then later banned it. I have no crystal ball to know what are they going to ban next, but I am sure you can find some subreddits that are now quarantined.

Maybe this list would help?

https://en.wikipedia.org/wiki/Controversial_Reddit_communiti...

Soon one won't be able to train NLP models on certain archetypes of speech if they continue banning everything deviating from preferred topics of their advertising/corporate sponsors :-(