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Hello!
I develop Internet projects and, from time to time, analyze companies offering similar services. Not that it was an analysis of competitors, rather an analysis of this niche.

Once again, after reviewing several web studio sites, I receive a VKontakte message from the manager of one of them.
I wondered how I was found - I did not leave my data.
Next came the following dialogue.






I wondered what kind of service it was and how it works. Google helped here - socanalitic.ru
It turns out that by setting the code of this service to your site, you can see: name, surname, telephone, source of transition, photo, number of visits, interests.
There is no question of any anonymity. Again, the pages of VK are in the public domain.
What can I say about the protection of personal data and personal life in general? Do not post information about yourself in social networks.
')
And imagine, the manager is crazy enough to call you, they say you came to our site ...

Personally, I, from a similar way to attract customers, have only an unpleasant feeling. I thought nothing could annoy more than the modules of online consultants and pop-up windows "You are already 28 seconds on the site ....". It turns out it can!

It is very interesting to know your opinion on this matter.

ps The article is not advertising, I am really interested in your opinion, I come across a similar service for the first time.

UPD
The comments suggested that this thing is called clickjacking.
Found a couple more articles on the habr about it: Legal Clickjacking VKontakte and Follow us or clickjacking for business

UPD 2
And from a legal point of view, what does it look like? It reminds me of a sms-newsletter to which I did not subscribe.