hard to see how that meaningfully differentiates them from everyone else given that this is what all the ad platforms seem to be moving towards with topic/cohort based ads and third party cookies on the way out.
Brave's been blocking third-party cookies from the beginning; Firefox and Safari followed in 2019 and 2020 respectively. Third party cookies might not have been on the way out if Brave hadn't taken that first step already.
I guess they have failed in marketing the differentiation then (if there is one). I was just clarifying the product in question, never promised an ad free product.