Within a few years people will be accustomed to the idea of AI chatbots selling them stuff and it will be obvious then too. The first time paid placements appeared in a catalog, it was probably also not obvious then.

catalog ads are labeled. "what's the best something I can buy?" is begging for unlabeled ads that go against your interest. if you literally cannot tell between ad and not ad, you can't skip to actual results, it's useless.