Re: This was the case...
Yep, pretty much an open and shut case. The "like" button is very clever marketing by Facebook but it really is just a tracking beacon and one of the reasons for the GDPR. More importantly, companies that use gimmicks like this are fooling themselves: while they can collect some data, they can only get what Facebook will give them, while Facebook gets to keep everything and aggregate it so that they can track users across the internet; they can (and do) even sell the data collected to companies' competitors. Would be nice to see more emphasis on the business aspects in these kind of stories.