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Re:Facebook ordered to delete illegally collected data by Be... by emiliobumachar on Friday February 16, 2018 @11:36AM (#16393519)
As far as I know, Like buttons are partially served by Facebook, which then knows I've accessed the site (the NYT in your example). This happens even if I do not click the button, do not hover over it, and do not have a Facebook account.
Re:Facebook ordered to delete illegally collected data by Be... by merreborn on Friday February 16, 2018 @02:22PM (#16395132)
> Like buttons are partially served by Facebook

Yes, the default configuration has your page include javascript from facebook.net which the browser will request on every page view

https://developers.facebook.com/docs/plugins/like-button

In the case of this the theguardian.com page it looks like they've got a webbug as the last element of the body, which results in a request to https://www.facebook.com/tr?

Having facebook count views of your like button is probably considered a feature to publishers.