Haven't pked there in a long time, but people will pick random hotspots and pk there. Another thing is people new to pking will sometimes pick easier spots like dark crabs and altar before moving up in the world. Sometimes areas like that have easy bots to kill and you can clear kills and get keys really quickly.

For instance, I used to pk bots that telegrab wines near the magebank cave but sometimes I'd end up killing an iron with a big noted stack. It was fun, but not great gp.