Selling attention is what twitter, facebook, google, and co do. They just don't name it "attention token" and they don't give you anything for yours. Brave pays for your attention with "BAT", and you have to opt-in for it. Once you have BAT then you can pay it forward however you see fit - for most frequently visited sites, for sites you chose manually, for git-hub commits, individual reddit comments, etc (Brave has separate buttons near those). Or you can decide to keep it for yourself.

I am pretty sure it is a massive improvement over the current way of doing things. Sure Brave would get a big cut because of being in the middle of this. But it manages to use ads in a way that profits everyone: users, content creators, ad companies, and Brave themselves.