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A concrete recycler's tower beside I-94 has been painted Polymarket blue and lettered with the platform's name. The city says adverts on water towers need a permit, there is none on file, and its buildings department is sending an inspector out with a "possible correction order". The stunt lands in the one state where Polymarket has already lost in federal court and its rival Kalshi is under a state injunction.

The programme lets developers publish unfinished apps without public ratings or reviews. Researchers say that is exactly why it is filling with "ghost casinos" and reward games that never pay out, promoted on TikTok and Facebook with deepfaked celebrities. One had more than a million downloads and not one review. Google says it is investigating.