PARIS, FRANCE – JANUARY 31: In this photo illustration the Facebook logo is seen on the screen of an iPhone on January 31, 2019 in Paris, France. The social media Facebook revealed to have paid teenagers to watch their activities on their phone. The company has offered Internet users to download the application “Facebook Research” to observe all their deeds and actions, against payment. Despite this, Facebook shares soar by 11% in the wake of the announcement of a net profit up 61% to $ 6.9 billion for the last quarter of 2018.