They say: "When you use Qwant, no personal information whatsoever is neither captured or transmitted to advertisers.", but then they also say: "We believe we now have designed a simple and efficient offering by working with the Microsoft Bing ad network."

Is it just me, or are these two statements oxymorons?

They probably say "give me some ads for keyword 'react js'" and don't pass on your IP or other identifying info.

Still a problem if you search for your own name, but I don't think you can do much about that. Or maybe MS provides a bloom table / index of all keywords they currenty have ads for, so you can check "offline" before sending it to them?