Polymarket, Kalshi Give Free Groceries Amid Prediction Market Boom

Two leading prediction market platforms, Polymarket and Kalshi, have both turned to giving away groceries amid a fight for dominance in the fast-growing prediction markets space.

Kalshi offered a $50 grocery giveaway to over 1,000 people in Manhattan on Tuesday, while competitor Polymarket announced plans to open a free grocery store starting next week.

Kalshi and Polymarket have led the pack in prediction market trading volumes, which are now consistently above $400 million daily, representing about a fourfold increase from this time last year.

Kalshi banked $263.5 million from fee revenue alone in 2025, while both platforms have been marked at multibillion-dollar valuations on the back of major integrations.

The Kalshi promotion was offered at the Westside Market at 84 3rd Ave. in Manhattan between 12 pm and 3 pm local time on Tuesday, with videos on social media showing the lines stretching for multiple blocks.

According to Kalshiโ€™s guest list, 1,795 people signed up to receive free groceries, while mainstream media reported that โ€œthousandsโ€ attended.