What you may be thinking of was at one point, when you went to a URL (for some URLs), the browser would rewrite the URL to contain their affiliate link. There was blowback for doing that. They quickly removed that/haven't done it since as far as I know
In fairness, that is incredibly shady and they deserve this mistrust even years later because of it.
Brave never did that.
Brave blocks third-party ads & trackers by default.
(disclaimer: I lead privacy and adblocking at Brave)
(disclaimer: people remember how sketchy Brave is)
What they should have done instead is just take hundreds of millions of dollars from Google, like a non-sketchy browser.
The issue which I found out about late, and fixed right away, was infringing on right to publicity, nothing to do with donations from users' own tokens.
Disclaimer in case it's not obvious: I am a Brave employee