Note by @fastfinge

@brasil @rimu And far, far more of my traffic comes from federation than from any bots. If your traffic blocked that much, I suspect your filters are preventing other servers from federating correctly. Remember that every upvote or downvote on any post anywhere is a federation event that your server needs to receive, in order to keep the vote counts up to date. So if you have even tens of active users you should be getting sometimes a hundred of these per second. Then there's stuff like LiveThreadBot, that edits posts when socur games are going on, updating them with every single play.