That's assuming that search preferences are homogeneous, that everyone in the world uses DDG, or that the people currently providing click data are a representa

That's assuming that search preferences are homogeneous, that everyone in the world uses DDG, or that the people currently providing click data are a representative sample of the world. The first and last things might be true for a few terms, but even then, the order of the search results is a very tricky thing (e.g. NYTimes or WSJ editorial page first? the difference in traffic between 1st and even 2nd or 3rd on the search results page is huge). The only real benefit is that you and your neighbor are in the same filter bubble.