Kalshi, the prediction market platform that lets users wager on everything from sports and politics to drug trials, is now in hot water over new markets betting on flight cancellations. Flight-tracking platform FlightAware filed a lawsuit against the company on Monday, alleging that Kalshi used its data and branding without permission.

Kalshi first launched markets allowing users to bet on the number of flight cancellations nationwide and at specific airports last month and, according to the lawsuit, Kalshi used FlightAware’s data to settle those bets, listed the company as the markets’ “Primary Source Agency,” and displayed the company’s…

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