Here is a question for ya... I always hear about sites getting penalized both algorithmicly and manually for "PBN" linking which from what I understand is interlinking sites you own to pass link juice to your other sites owned. If that is the case how does sites like The Chive who plain as day in the header links do follow sitewide links to all the other sites in their network... another example is PMC network that is with Hollywood Life in the footer they link do follow to their network of sites thus passing juice across all sites. Another is The Awl in the footer they interlink site wide all their sites passing juice across the entire network... This is just a few but there is tons of hugely popular authority sites doing this. What's the difference if you do it? How can Google possibly penalize you for the same thing popular sites do as well?