Lol the problem here is assuming privacy is one of braves main strengths or even goals. When it's not lol. Brave makes money off tracking you and exposing your data, not in keeping it private.
I work at Brave. We don't track you, or expose any data (we don't even have your data to begin with). Reputable researchers have found Brave to exist in a class of its own as the "most private" popular browser tested: https://www.scss.tcd.ie/Doug.Leith/pubs/browser_privacy.pdf.
Do they actually? I would be interested in reading some literature about this. How have they used/exposed/sold user's data?