Slightly off topic, I'm not sure, but way back in the day (2000ish) a friend of mine used PERL scripts to scrape all the big databases which existed at the time, namely IMDB.

He used PERL for scraping and the same for generating "new" content with what he had scraped. He made a bunch of static websites with ads. The sites connected to each other. Sports, Celebrities, Movies, you name it. He had a formula.

Those sites were profitable enough that he could travel the world and have fun, basically. His mother collected the cheques from Google and cashed them into his account.

Now to get to the final point here, his secret was simply TYPO INJECTION to avoid Google's then embryotic duplicate content detection.