According to Matt Cutts and google you are allowed to link together different websites together as long as its not an insane amount. So PBN's depending on how they are used can actually be white hat seo. I'll be replicating how Ziff Davis and Purch operates their network(as well as other companies that I don't know off hand), but the question would be what would seem more organic in the eyes of Google? 1. Launch all 10 branded sites together at once under a LLC(with its own separate site) 2. Launch the LLC site + 1 branded website and then add new websites over time 3. Launch the LLC site + 1 connected branded website and 9 unconnected branded websites and over time add them to the network by having the LLC buy them and issue a press release every time a new website is bought and added to the network.