The links at the bottom of their blog aren't inline in any other text. They're "clickable UI elements that stand on their own", "in a group with other related [links]". One could easily argue they're more button like, especially the email and call links at the very bottom of the page.

The author is complaining about nobody would understand to click on Accept in their example without having an outline around it and yet they expect people to understand to click on "eMail" and have it open their default email client.