Just stuff like this one -
williamhillfreebet.co.uk/
There are tons of them about for the various bookies, I agree they usually fade away again but some of them do hang around and it just bugs me as sometimes they will get top for a couple of months before Google gets to grips with the fact that they are a crap site. For people who play by the rules like me, it just bugs me a bit to see people getting away with this sort of thing.
Agree the only way they can get away with it is registering an account with another site and then using the same affiliate links on the dodgy domain, but surely the bookies can track this?