Kalshi and Polymarket compete with each other through "free food" promotions.

According to Mars Finance, on February 4th, ahead of the Super Bowl, prediction market platforms Kalshi and Polymarket intensified their user acquisition competition, clashing over a "free food" promotion in New York. Kalshi launched its promotion on February 3rd at WestSide Market in Lower Manhattan, offering customers $50 worth of free groceries. Long lines formed, with many participants saying it was equivalent to several hours' wages, making it very attractive. Kalshi co-founder Tarek Mansour stated that this move was to give back to the community and expand its user base. Polymarket, on the other hand, announced the opening of "The Polymarket," New York's first free grocery store, on February 12th, with all items free, no purchase required, open to all New Yorkers, and an additional $1 million donation to local food banks.