What advertising tools on the Internet allow you to show ads to only one person?

Question

contextual advertising

What online advertising tools allow you to target only one person to one person?

For example, in VK it is possible to do targeting according to your user base, provided that 999 users are fake and 1 user is the one for whom the ad is set up.

There is a lot of information about a person: email, phone number, poppy address, access to a wi-fi router, i.e. there is access to a home wi-fi network, there is a VKontakte and Instagram profile. It is also possible to ask a person's iPhone and go to your own website so that he gets into the retargeting group (but the problem is that retargeting is not shown to 1 person, the base needs to be bought by users)

Answer 1

Of course, you can try to set up targeting in such a way as to hit the right person as accurately as possible, but in general, advertising mechanisms are set up in such a way as to anonymize user data as much as possible, that is, targeted display of certain advertising to a specific user is against the law.
And yes, the easiest option is to write to him directly by e-mail, send SMS, message VKontakte and direct instagram))

Answer 2

How about just saying no?
Or is there some kind of scam...

Answer 3

Well, you make a fake site that no one will go to, log in as a user and retarget him