This article,
Case Study: How Switching Tools Increased Email Reply Rates by 187% [moz.com] in 1 Month, reads like a NEWB confession of how they stumbled about learning the link building process. I was astounded at all the rookie mistakes they detailed, from the low conversion rates to the cheesy template they use. They even published the actual template they use.
But here's the part I found interesting. The author of the article, a content marketing expert from Modernize.com, openly admits to paying for guest articles for the purpose of building links. In a list of event milestones, event number eight is this:
8. Paid: There's a fee for posting an article.
I am not one to "out" a company for engaging in practices that may violate Google's Guidelines. However, this is an article published by the company itself. My concerns are:
1. The company that wrote this case study is apparently so newb that they out practices that may violate FTC and Google Guidelines.
2. In my opinion I believe their link building practices may violate FTC guidelines if their "paid" articles are not labeled as advertising
3. In my opinion their link building advice may violate Google's guidelines
4. It's surprising that Moz allowed this to be published without any challenges or comment as to how the techniques may violate FTC Guidelines as well as Google's Guidelines.