Ask HN: Why don't we have yellow pages for the Internet?

It seems like a centralized directory of ads with a search engine would be an easier and more ethical way to show users ads.

Currently, even with massive tracking, the ads are completely non-relevant and it's next to impossible to find a previously seen ad.

Additionally, this would automatically make other services subscription-based. Do you think a yellow pages-style directory for the Internet would be useful and successful?"