"DuckDuckGo gets its results from over one hundred sources, including DuckDuckBot (our own crawler), crowd-sourced sites (like Wikipedia, which are stored in our own index), Yahoo! (through BOSS), Yandex, WolframAlpha, Yelp, and Bing."
I also don't see "we don't track" as a liability, given that Google themselves get relatively little by way of relevance from profiling (though it may contribute to ad sales). Rather (and this is straight from a Google engineer): "It's really hard to do much better in search advertising than current query + location."
"DuckDuckGo gets its results from over one hundred sources, including DuckDuckBot (our own crawler), crowd-sourced sites (like Wikipedia, which are stored in our own index), Yahoo! (through BOSS), Yandex, WolframAlpha, Yelp, and Bing."
I also don't see "we don't track" as a liability, given that Google themselves get relatively little by way of relevance from profiling (though it may contribute to ad sales). Rather (and this is straight from a Google engineer): "It's really hard to do much better in search advertising than current query + location."
https://plus.google.com/104092656004159577193/posts/HFT1emeF...
So: DDG gain a niche, possibly a large one, influence the marketplace, and lose very little in ad placement relevance.