https://phys.org/news/2019-02-german-antitrust-authorities-restrict-facebook.html

"In future, Facebook will no longer be allowed to force its users to agree to the practically unrestricted collection and assigning of non-Facebook data to their Facebook user accounts," FCO chief Andreas Mundt said in a statement.

"If users do not consent, Facebook may not exclude them from its services and must refrain from collecting and merging data from different sources."