The social media platform X, owned by Elon Musk, has added Nestle, Abbott Laboratories, Colgate-Palmolive, Lego, Pinterest, Tyson Foods and Shell to a lawsuit claiming an ad industry coalition illegally boycotted the site. According to the complaint, the businesses and the World Federation of Advertisers, a trade association for advertisers, broke antitrust laws by banding together to prevent X from receiving billions of dollars in advertising.