Washington | The American airline JetBlue sparked a storm earlier this year when a social media interaction appeared to reveal it was using more than just supply and demand to set fares. It was also betting on misery, urgency and a willingness to pay.When a customer complained on the social media platform X that a flight they needed to book for a funeral had increased by $US230 ($325) in a day, the corporate account suggested they delete their browser cookies, which are digital pixels that allow websites to track users.Subscribe to gift this articleGift 5 articles to anyone you choose each month when you subscribe.Subscribe nowAlready a subscriber? Fetching latest articles