They were, for a time, taking donations on behalf of websites despite those websites not knowing that brave existed, or the donors not knowing that their donation was going to an unclaimed wallet. I can't remember what happened to the BAT - held for them if they ever did pick up brave I think, but eventually dumped back into the BAT pool. That, and substituting Amazon referral links, engendered distrust that is hard to overstate. Do you think is just a crypto=bad thing alone? That wasn't my impression.
Not Amazon referral links. More like Firefox Suggest or the like: Write eg. "Binance" in the URL bar, and one of the results in the dropdown menu is a sponsored link to "binance.us" who are partnered with Brave. The feature had a bug that caused complete, valid URLs (ie. you wrote "binance.us") to be shown the sponsored link as a primary completion option.
The issue persisted, as far as I know, one day. The response was to both fix the bug and make the feature be off by default.
