Hey,

I have just released a public version of our backlink blacklist database of known public blog networks, guest post farms & links sold via cold outreach or marketplaces like Fiverr.

There are over 60,000 domains on the blacklist right now:

https://linksthatrank.com/backlink-blacklist/

You can see exactly why a domain is on the blacklist AND a screenshot of the evidence to back it up.

Give it a try and let me know what you find!

- Matthew Woodward