Spam and bots like other people have said. Then there are the instances that get blocked because of the content and people there. Nazis, racists, trolls, etc. They were coming in from all over during the twitter migration. There was a blocklist on GitHub that was being updated pretty frequently.
Oh man. Me too. The player market and pvp were the best. I loved how there were battles to actually control territory. There were places you just couldn’t go unless you were covert. That game should have gotten so much more love back then.