A major reason that Google searches are so valuable is not that there are so many of them; it is that people are so honest in them. People lie to friends, lovers, doctors, surveys, and themselves. But on Google they might share embarrassing information, about, among other things, their sexless marriages, their mental health issues, their insecuriti

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DuckDuckGo is a free, privacy-focused search engine which is one take on that and does 100M search queries daily and has roughly a 2% share in the search market in the US. It does also have a keyword-based ad model, but does not personalize or target search results or ads other than based on the search term.