Gabriel Weinberg, CEO & Founder at DuckDuckGo.com (2008-present)
Snippet: Anonymous Affiliates
As mentioned, DuckDuckGo is profitable based mostly on keyword-based search ads, though we have always been on the search for other ways to anonymously make money so that we can reduce the dependence on advertising. The only other way we've found so far, which currently accounts for a much smaller portion of our revenue, is non-tracking affiliate partnerships with Amazon and eBay.
When you visit those sites through DuckDuckGo, including when using !bangs, and subsequently make a purchase, we receive a small commission. This mechanism operates anonymously and there is no personally identifiable information exchanged between us and Amazon or eBay. These partnerships also don't affect the ranking of search results. The reason we can do this in an anonymous way with Amazon and eBay, though not with other retailers, is because Amazon and eBay run their own affiliate networks.
Me.. DuckDuckGo is one of my favorite search engines. I think it was Kurt,
Boom Boom Boom Boom!, that turned many of us on to it years ago.
Here is another way to search anonymously..
https://anonymiz dot .com/?https://www.exampledomain dot .com
Note: anonymiz dot .com has some interesting tips.