I fully believe you have only the best intentions, but unfortunately advertisement companies don't. Simply allowing them to put ads there directly leads to your users being tracked, even across websites. DDG does not have a clean slate either, Microsoft is actively tracking through ads.
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We don't plan on sharing any info. Our ads would be more inline with DDG's, and based only on the user query.
I fully believe you have only the best intentions, but unfortunately advertisement companies don't. Simply allowing them to put ads there directly leads to your users being tracked, even across websites. DDG does not have a clean slate either, Microsoft is actively tracking through ads.