By contrast, AngelList founder Naval Ravikant is a little cheaper. He charges only $20 a pop.

Usage of Earn is not widespread, but it’s not unheard of in the tech world. Emailing lists of people in a specific industry (who said yes to this type of contact) is another option. When the company rebranded from to, the announcement said, “The idea behind is that we’ve built a positive-sum social network, where every notification is an opportunity to earn money.”