I started collecting data around March/April 2014 so this page — and the listed case studies — is pretty much work in progress.
- Hey Google! I Want A Penalty On SponsoredCircle.com
- HARO Link Building Case Study: It’s Not as Fruitful as You Think (2019, Monitor Backlinks)
- Honesty in SEO Pays Off: A 2015 Ghostblogging Case Study (2016, Bosmol.com)