Nah, they decided some subreddits are "bad for advertisers" during the covid time, and /r/conspiracy got put on a long list of "undesirables". The precedent for the was /r/the_donald before that).
Some more radical pro-censorship subreddits decided to just ban anyone posting on any of those subreddits, and the sentiment spread to larger subreddits, like eg. /r/pics).
Combine conspiracies and covid, and "spreading covid fake news" was the official reason to ban people just by posting to any of such subreddits.
No, just the ones that were linked to u/maxwellhill, the lead moderator of r/worldnews, r/politics, and r/technology:
https://www.dailymail.co.uk/news/article-8506313/Ghislaine-M...