>What’s more I can compartmentalise my interests by sending different tokens at different times.
I'm really perplex. People who care enough about their privacy to make use of something like that are probably those who don't want ads or tracking at all anyway. The rest of the population obviously doesn't care.
I personally can't imagine ever willingly enabling ads in my browser. You want me to pay for your service? Then ask for my credit card number, I may give it to you. If you prefer to beg for me to turn my ad blocker off then be my guest but I won't do it.
The idea of installing Brave, curating several "tokens" containing my interests and selecting what to send to which website is frankly preposterous to me and of dubious value for the advertisers.