Big Tech companies typically offer services to millions of users, and thus can hold sway on user behavior as well as control of user data.[13] Concerns over monopolistic practices have led to antitrust investigations from the Department of Justice and Federal Trade Commission in the United States,[14][15][16] and the European Commission.[17] Commentators have questioned the impact of these companies on privacy, market power, free speech, censorship, national security and law enforcement.[18] It has been speculated that it may not be possible to live in the digital world day-to-day outside of the ecosystem created by the companies.[19]