Privacy certainly seems like it is the main reason people would switch. Also second time someone mentioned not requiring all search terms to be present. Quotes

Privacy certainly seems like it is the main reason people would switch. Also second time someone mentioned not requiring all search terms to be present. Quotes around each term definitely helps, but Google doesn't always respect that. Google also has a "verbatim" search option as well. Correct on the search engines, below are the search indexes used by each: Qwant = Bing Startpage = Google Ecosia = Bing