Probably can’t be libel if they don’t make it public, just stuff that happens behind closed doors and they can say “no comment”. Would be different if Reddit had a public modlog like Lemmy.
My guess is, after 10 years without a problem, someone around 2 years ago might have marked me for takedown for whatever reason. I always tried to be respectful, but didn’t start self-censoring until they suspended me for “violent content” without even referencing what was the supposed content. I kind of hoped that using Power Delete Suite to blank the account history, and avoiding most polemic topics from then onwards, would keep it safe, but apparently not.
Ironically, an alt account I created to participate in more polemic topics, got zero problems… but they now banned it along the main one, so bye Reddit, so long and thanks for all the fish.