> So then what, you get curators like Google who become super powerful?

Doesn't Google currently own one of the biggest advertising platforms on the entire planet, and don't they curate what categories of products are allowed to appear on it?

There are lots of problems with curation, but I am not convinced centralization is one of them. At least, I'm not convinced that centralization is any more of an issue with curation than it currently is with advertising. There's no reason to centralize curation and give control to one company/government any more than there is reason to centralize Internet ads with one company/government.