Site with over 1k backlinks per domain?

Hello,

Looking at a niche that appears to be high comp on the surface. Digging a little deeper, the #1 site has over 5k backlinks from 150 domains. One domain looks like a PBN (appears in Ahrefs), and is completely off topic.

The backlinks appear to be coming from a banner from the moneysite, and is placed at the top of the page. The banner is ********, and completely off topic by a mile. Not even an affiliate link.

If a site has 1k backlinks from a single domain, is this something…

Site with over 1k backlinks per domain?