Facebook parent company Meta Platforms defeated a US attempt to unwind its acquisitions of Instagram and WhatsApp on Tuesday when a federal judge ruled the company did not hold a social media monopoly. The ruling gives Big Tech its first decisive win against the antitrust crackdown started in US President Donald Trump’s first term, and is a major setback for the Federal Trade Commission, which is pursuing a separate antitrust case against Amazon.com. The agency sought to force Meta to...