Facebook’s global crash highlighted risks of relying on its social networking products, bolstering European regulators’ efforts to limit its reach amid a potential U.S. whistle-blower’s testimony.

Facebook’s networking problem, affecting 2.75 billion users, highlights the importance of maintaining fair digital markets. Whistleblower Frances Haugen’s accusations of profit-driven priorities have prompted concerns about countries relying on the services. Facebook faces antitrust and privacy investigations.

EU lawmakers are set to vote on new laws to limit Facebook’s expansion into new services, highlighting the consequences of relying on one company for key communication channels. German Green member Rasmus Andresen calls for strong regulations against quasi-monopolies.