How does Yandex.Metrica recognize a profile from a link from VKontakte?

Question

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Working with the metrics for one site, I found that I can see a list of links to the pages of people and VK communities , where a link to the site apparently appeared. At the same time, I thought that the HTTP Referrer protection in the form of an intermediate redirect page (vk.com/away.php) protects against this..
Metrica > Counter > Sources > Social networks

Answer 1

If the user sits through the http protocol, then VKontakte sends the transition page through the HTTP referer. If via https , then vk.com/away.php will be displayed .