I was just reviewing the Moz DA and Mozrank (using scrapebox) for a bunch of my domains to decide which to cull and which to renew. None of the sites generate money and don't have much traffic. But, and this is what I found interesting, five of the domains have a DA between 22 and 35. PA is between 29 and 42. All are indexed. The majority are with the same registrar but all bar two are hosted separately. So so could it be that I've accidentally built myself a little PBN? I can think of any footprints that would link the sites. They are all in different niches, but could I start diversifying the (quality) content I'm posting to allow me to create homepage links to sites I want to give an SEO boost to? How can I bolster the potency of this little PBN or should I leave them alone? I really want my own PBN so I'm optimistically hoping I might have given myself a head start. Help!