I had never read the Brave ad model before. They want to display ads while respecting user privacy, which is nice from a user point of view, but do advertisers actually want that rather than being able to target 35-40 years old in Ohio that are using shaving products twice a week ?
Brave developer here. Great question! Brave Ads are entirely opt-in, and work via on-device machine-learning. The machine-learning bits study your browsing habits in a private, non-leaky manner. Once a day, your device downloads an aggregate catalog of many ad options to be studied locally. If/when an ad is found that fits your interests (as inferred by your browsing habits), the ad is displayed as an OS notification…
So from the FAQ : https://brave.com/faq/#all-ads-blocked
> Each ad request is anonymous, and exposes only a small subset of the user’s preferences and intent signals to prevent “fingerprinting” the user by a possibly unique set of tags.
It means that advertisers still get some feedback on the "intent signals" of the users that have seen their ads ? So it is private in the sense you cannot be uniquely identified but some of your intents are somewhat leaky ?