In 2023, Massachusetts legalized online sports betting. We used 3+ years of transaction-level debit card data to follow 2,441 people who placed a bet the week of legalization. Most rarely bet again. But they're not the ones sportsbooks get revenue from. This story is about the ones they do.
The Gambling App Playbook for Bankrupting Young Men
More than half of US men under 50 are betting on sports. But the sportsbooks are making nearly all of their money from a far smaller group betting far more often.
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