What is the revenue generation model for DuckDuckGo?
> <i>In fact, search advertisers buy search ads by bidding on keywords, not people. It makes intuitive sense, too. If you search for ‘car’, you are more likely to respond to a car ad than something you searched for last week.<p>This keyword-based advertising is our primary business model.</i><p>The rest of the post is a rant about user tracking.