Reddit removed The_Donald from showing up in All, changed their search algorithm, and changed the number of active users showing up on T_D (they screwed up and you could see the true number on their ad buy portal).
Those were all 100% admin actions to censor, not moderator actions.
Almost all censorship is moderation. And that's "decentralized" and not part of the company itself.
Honestly, Reddit would be better if they started laying down the law.