[Kye]

>> "the author of this article is a PhD who is advertising their services at the end"

That's an author bio. Completely ordinary for articles and has been since the print days.

[JackFr]

Nonsense -- it's entirely self-promotion:

> At that point, they called me to help as a hybrid work expert who The New York Times has called “the office whisperer.” We worked on adapting their return-to-office plan, . . .

> In another case, a large financial services company began noticing employee turnover despite offering competitive salaries . . . . After consulting with me, they adjusted their policies to be more competitive in offering flexibility.

He's just trying to sell books and consulting. Nothing wrong with that -- but hardly objective analysis.

[Kye]

You missed this:

>> "at the end"

Whether the stuff elsewhere is promotion is a different discussion. I didn't comment on that. The stuff at the end is a bog standard author bio.