Knicks fans have been taking to the New York City streets to celebrate the team’s success during this year’s NBA Finals run. At the same time, Kalshi and Polymarket are trying to capitalize on the momentum, turning the internet culture they cultivate into real-world, viral marketing moments.

The prediction-market rivals, both valued in the multibillions, have used shitposting tactics to generate attention online, from posting AI-generated images of sports stars with salacious headlines to paying influencers known for spreading fake news to promote their platforms.

As crowds gathered outside Madison Square Garden, two viral fan moments drew scrutiny after it emerged both had prediction-market ties.

Kalshi has taken heat over a clip after Game 1, when 23-year-old Knicks fan MD Ahnaf Hossain spoke into a Kalshi-branded microphone, saying, “My mayor Muslim, my bagels Jewish. My Christian Dior — Knicks in four!” The clip, amplified by a Kalshi-affiliated social media account, has drawn tens of millions of views and coverage in outlets including The Washington Post and The New York Times.

Kalshi later posted a follow-up interview with Hossain, who said he was drawn to the “iconic green mic.” The moment has drawn sharp scrutiny, including some who claim Hossain should admit he wasn’t the first to utter the phrase.