Lina Khan, chair of the Federal Trade Commission, speaks during the 2024 CNBC CEO Council Summit in Washington, D.C., on June 4, 2024.Shannon Finney | CNBCThe Federal Trade Commission is launching an investigation into so-called surveillance pricing, seeking more information about how artificial intelligence is used to change pricing rapidly based on data about customer behavior and characteristics.The FTC says the practice allows companies to charge different customers, different prices.The age...