Gabe, the CEO, addresses this directly in the interview. He said that the most lucrative advertising is for things like insurance, cars, etc and that most peopl

Gabe, the CEO, addresses this directly in the interview. He said that the most lucrative advertising is for things like insurance, cars, etc and that most people just type that directly into the search bar. Advertisers just bid on those keywords and DDG gets paid. They make money from keyword search and advertising.