What are the services for making money selling information about the audience for your site?

Question

Fintech

Prompt services for earning on the sale of information about the audience for your site .
Example: https://targetp.ru (you place the code on the pages of the site, it tracks the VK IDs of visitors and sells their lists to advertisers).
What other similar services do you know? Not only for VK, but in general.

Answer 1

Cerebro target?

Answer 2

And what about Cerebro? Cerebro analyzes the VC itself

Answer 3

how much traffic do you have? and the theme of the site?