I was looking back through a large number of my PBN domains in majestic and I noticed that most of the numbers that I originally based my domain buying decision on had changed drastically. Referring domain numbers had increased from 20-50 to in the hundreds/thousands for many of my domains, as well as trust flow/citation flow altering, sometimes positively sometimes dropping drastically. While I don't record the TF/CF numbers when I buy a domain, many have altered so significantly that I would never have even bothered investigating the domain in the first place. Fortunately I analyse anchor text and check for any drastic changes in appearance of the site to eliminate spam/previous PBN sites but the referring domain numbers have increased so dramatically on many of my sites that I would have ruled them out as spammed initially. Now before the 'don't trust metrics' crowd get on board, metrics are simply part of how I whittle down potential domains. I churn through hundreds of thousands of domains a week and they're useful for finding a level of quality that I then investigate further. Has anyone else noticed this and what do you make of it?