I just found a footprint one of the local seo companies uses for the sites they rank, so I went through and checked the sites out. I found something really weird when I looked at their backlinks. Nearly every link they had was from pages that were nothing but links. There was no pictures, no articles, no videos, nothing I thought you need to keep your backlinks safe. Below is one the sites, every backlink I found is like this. How is this possible? Like when setting up PBNs we take every precaution possible and still get deindexed. How can they just make link farms that work?