https://phys.org/news/2019-02-german-impede-facebook-data-combo.html > German antitrust authorities ruled Thursday that Facebook was exploiting its dominance in social media in forcing users to also allow the company to collect data from other Facebook-owned services like WhatsApp and Instagram, as well as third-party websites through the "Like" and "Share" buttons. > The Federal Cartel Office, or Bundeskartellamt, isn't contesting Facebook's use of customer data to target ads on the main Facebook service. Rather, the ruling said Facebook should have to get consent separately before using customer data from other apps and websites to do so.