Prediction market Kalshi has drawn outrage for refusing to pay out winnings on a $54 million trade related to the death of Iranian Supreme Leader Ayatollah Ali Khamenei. Many bettors assumed they had won big on wagers that Khamenei would be “out as Supreme Leader” by Saturday after he was killed in joint US-Israeli air strikes over the weekend. But Kalshi – an American prediction market that allows users to bet on politics, sports, foreign affairs and pop culture – announced it would not be