Where does the power from a PBN come from? Is it strictly from using a domain that already had juice from the past? I mean like if you were to build a brand new site with absolutely no links for your PBN, what's the point of it if it passes nothing? Would you have to do SEO on this PBN site to get the juice, but in doing so, wouldn't this defeat the purpose of having the blog "private"? I guess what I'm basically trying to ask is, where does a PBN's power come from?