I am sure what he actually got is much less than that number. If you got 200 up votes to a comment then that's 200 karma, but with submissions it is different, maybe dang can shed some light on that. Also what gets traction depends on a lot of things that you will find that most people will have the vast majority of their submissions have little to zero activity. So it is not that easy, some will manage to do it but the purpose is to limit that to something manageable. Then I think dang is managing both up voting ans down voting rings. With up voting being harder (everyone can do that)