The U.S. Federal Trade Commission fined Twitter $150 million for using account security data for targeted advertising, in violation of a 2011 order. The FTC said Twitter asked for user phone numbers and email addresses to protect accounts, then allowed advertisers to use the data, affecting 140 million users. In addition to the fine, Twitter is banned from profiting from deceptively collected data, must notify users the data was misused, and implement and maintain a privacy and information security program.