The goal was to offer folks a means of supporting the development of a privacy-preserving browser, at no cost to them. We blogged about the feature at https://brave.com/blog/referral-codes-in-suggested-sites/, and ultimately disabled it by default. But there was never any "hijacking of links," or "swapping of affiliate codes".
The truth is less exciting, I know.
When pushback increased, it seemed like it was addressed and then retroactively labeled a bug.
Your own dismissiveness of the issue on Twitter, including posting an image which didn't reflect the actual user experience in Brave stable at the time, left a similarly bad taste: https://imgur.com/a/x9smj6M
We didn't make anything from this bug, fixed it quickly, it's a black mark on our shield still but it wasn't some mustache-twirling grand plan, believe me. It was a blunder.
https://davidgerard.co.uk/blockchain/2020/06/06/the-brave-we...