
Facebook's administration now recognizes that it has other ways to track past users of the platform. Deleting Facebook accounts will not stop network tracking for users after their accounts have been removed and even non-users who have not already created profiles.
Mark Zuckerberg, Founder of Facebook, testified before the US Congress last week and tried to evade questions about whether the network was collecting non-user data as well. But he admitted - when pressed - that the network collects data that did not subscribe to the network and did not accept its terms.
Facebook responded to the blog after Zuckerberg's testimony on how they obtained the data and also identified where to get the data. The primary source of non-user data is websites and apps that use network services:
When you visit a site or use an application that uses our services, we receive information about your visit even if you are not logged in or do not have a Facebook account, because other sites and applications do not know who Facebook users are and who are not.This means that if you visit a site and click the "Like" or "Share" button, this site is likely to send data about your visit to the Facebook network.
The network also receives user data when they log on to a site or application using the network login data, sometimes showing the user "login using Facebook" in some locations.
Surprisingly, network specialists say Facebook is not alone in doing so. Many companies offer these types of services and also get information from the applications and sites they use.
They pointed out that Twitter and Pentrist Pinterest and Enkidan LinkedIn has buttons similar to the buttons "impressive" and "participation" Pfispock to help the user to share what they want on their networks. Google also has Google Analytics, Amazon, Google, and Twitter provide sign-in services with a user account. In the end, all these and other companies offer advertising services and most applications and sites send the same user data to many companies each time they visit the site or application.
The process of sharing user data is often aimed at refining the ads submitted to him. By specifying the location of the user, determining the sites he visits and the things he may buy through shopping services and other information, companies can provide the most appropriate ads to the user. User data leaks and networks win large amounts for service to advertisers.