Maybe I was tired when I read it, or lack of technical background to understand it entirely, but I did not quite understand how any of those sites got inbound l

Maybe I was tired when I read it, or lack of technical background to understand it entirely, but I did not quite understand how any of those sites got inbound links from other sites outside the control of the person who is building the empire so that any of them can get pagerank to pass it onto the higher level sites to start with.