To me it reads a little bit too much like an advertisement for the service it uses to middle-man-secure access to SSH. It mentions logging into the third party

To me it reads a little bit too much like an advertisement for the service it uses to middle-man-secure access to SSH. It mentions logging into the third party service with a Google account. This is adding some level of dependence-chain risk. Risks 6 and 7 in the article sound like they could be describing the risk added here. I'm pooh-poohing too much though, it's another alternative method of securing access that might suit where other methods do not. Good to know.