See that Hotbot? Looks a bit out of whack with the rest of them? 3rd level domains are almost garanteed a ban from Inktomi. In order to get a 3rd level domain into Ink and make it stick without getting banned, it has to be from a site in the white db. Either they get grandfathered (large portion of them), have been hand checked in the past or get let in because of size. Almost all non-www 3rd level domains trigger a hand check. If they don't find some "special" for a site, it gets the boot almost without exception.