Which is riskier? 1. Link from a site that would be considered a PBN; an expired domain with high authority back links in a relevant niche. Truly private and not a "public" PBN. 2. Guest post from a blog with spammy back links. (when I check the back link profile it's thousands of junky links). As a result the blog has high DA, PR etc... Which one would seem like a more legitimate link from Google's perspective? Also are links from blogs with thousands of crappy back links considered high risk? The difference between the two is that the first is an expired domain but with legitimate backlinks. The second blog is disguised as a real blog but has thousands of crappy back links. Which one is the most "low risk" link to point back to my site?