I keep noticing lately this kind of blogs: "I made millions without hard work from this simple passive-income scheme with just a small e-book..." etc. I wonder

I keep noticing lately this kind of blogs: "I made millions without hard work from this simple passive-income scheme with just a small e-book..." etc. I wonder who's making the REAL money. And what is he selling. These blogs are probably fabricated, but what's their point? Lots of people doing blogs and e-books about lots of niches? Only Google gains from that. Or maybe lots of unhappy "entrepreneurs" looking for SEO tips? That's more like it...