In a blow to Facebook’s business model, Germany’s highest court has ruled that the social media giant abused its dominant position to collect and pool user data, upholding an earlier ruling by Germany’s antitrust watchdog, the Cartel Office.

“There are no serious doubts about Facebook’s dominant position on the German market for social networks, nor that Facebook is abusing this dominant position with the terms of use prohibited by the Cartel Office,” the court in Karlsruhe said in a statement.