I call those type of businesses "recursive businesses." Just like your real estate example, most multi level marketers make almost all of their money from brin

I call those type of businesses "recursive businesses." Just like your real estate example, most multi level marketers make almost all of their money from bringing new sellers into the fold rather than selling to actual customers, or people doing webinars to teach people how to do webinars, or all of the web hosting affiliate sites that teach people how to make money from being an affiliate for web hosting sites(just sign up for Bluehost first!). I don't think Farnam Street is recursive since he's not really recommending that people do anything with the knowledge. It's just a place with a bunch of interesting ideas, though sometimes it feels like he's picked all the low hanging fruit already.