I was initially left with the impression from the link title that he was running some kind of a scam or was selling books with the brute force of his marketing

I was initially left with the impression from the link title that he was running some kind of a scam or was selling books with the brute force of his marketing prowess. So yes, it is an important part of the TL;DR in that this is the piece of information that would have saved me from clicking on the link.