I don't really want to defend X here but this is probably a non-story or at least not the one the tweet is implying. FB has a similar list, and it's not because of some secret agenda but because taking down posts that get a bunch of user-reports is actually a pretty effective system, except for high-profile accounts that have every single post reported by people who just don't like them. You end up having to maintain a "don't automod" list.