JetBlue has been sued in a proposed class action claiming it uses customers' personal data to set ticket prices, after its response to a social media post raised concern that the carrier employed "surveillance pricing" to make flying more expensive. JetBlue's response said the passenger should try "clearing your cache and cookies or booking with an incognito window. We're sorry for your loss." The Long Island City, NY-based carrier said on Monday its response was incorrect, while adding that "fares can chan ...