First of all, why its called a network? From what I've read so far, interlinking the PBN sites is strictly "no no". Backlinks should come from niche related sites/pages (ideally). So if my money site is in "health" niche, PBN should be in "health" niche too .. am I correct? So I make one money site then .. lets say 10 more sites using expired domain on same niche .. then send a backlink from them to the money site? Did I get it right? Doesn't it looks fishy when google finds a site with low amount of content and low activity/visitors only sending link to "one" site? It will look even more fishy when google finds similar type of multiple sites doing the same for the same site. I mean .. there must be a catch .. that I am missing. Otherwise everyone won't be making PBNs. What is the catch here? I've read some guides on how to create PBNs .. I don't see much discussion explaining how PBN works or what is the proper way of creating link between PBN and money site. Something like that would be very useful for starters. Why we can't interlink the PBN sites? If they are all in similar niche then they should be benefited by it and so flow more juice to the money site. Now I must be wrong but please show me why.