It's also all over LinkedIn. It's all just kind of super dumb imo. One of the worst offenders of note was this security person's ad-riddled regurgitation of it that they promoted on LinkedIn:

https://hackingpassion.com/linux-inside-pdf/

When I protested about their shitty website shoving ads down my throat, the answer was - I'm paraphrasing of course, but something along the lines of - of course I need ads! I have to cover the cost of my shitty WordPress site (and what are you even thinking to question that!!?? You outta ur mind or somethin?)

I felt like I was indeed stuck with her in 2010 after that...