Recently, Facebook had gone public with its intentions to merge user data from its own Messenger app with that of WhatsApp and Instagram. Yesterday, the German federal corporate trust-monitoring office ruled against Facebook's license to do so in the country. It cited the fact that Facebook can only pool data as it wishes if the user of each respective app consents to this activity.
https://www.notebookcheck.net/A-German-authority-has-moved-to-prevent-Facebook-s-messenger-app-merger.405711.0.html