I have just thought about a thing, on all of these famous wow guides like Joana, Valkor, Brian, and soem others, they all advertise for each other, and the pages are built-up on nearly the same way and i don't think they would advertise for each others guide since it would be like Apple advertising for Microsoft (wtf?)....
What do you think?
Note: I don't complain or anything i did just though of it and i woundered to know.