Facebook in EU antitrust crosshairs, online marketplace now under scrutiny

BRUSSELS (Reuters) - Facebook's online marketplace has attracted scrutiny from EU antitrust regulators who are seeking details about its role vis-a-vis rivals in online classified ads, a questionnaire seen by Reuters showed.Launched in 2016, Facebook Marketplace is used by more than one in three Facebook users in the United States to buy and sell items, leveraging its large user base.Classified ads competitors have complained that Facebook has used its market power to give it an unfair..