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Coinbase Apologizes After March Madness Prediction Market Alerts Trigger User Backlash

Coinbase Apologizes After March Madness Prediction Market Alerts Trigger User Backlash

Brian Armstrong said a targeting bug caused repeated prediction market push notifications on March 29, and stated Coinbase is fixing the issue while working on more tailored user content controls.

Fact Check
The claim is corroborated by multiple independent news reports and a primary social media post from Coinbase CEO Brian Armstrong. The reports consistently mention a 'targeting bug' related to March Madness prediction market notifications and an apology issued on or around March 29, 2026.
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Summary

Coinbase Chief Executive Officer Brian Armstrong said a targeting bug caused frequent prediction market push notifications on March 29 and apologized for the issue. He said the problem is being fixed and that Coinbase wants to give users more control over content preferences rather than broadly banning an entire category. The alerts were tied to Coinbase’s prediction market offering linked to Kalshi, which launched in January. The incident comes as U.S. prediction markets face broader regulatory pressure from several states and the Commodity Futures Trading Commission.

Terms & Concepts
  • Prediction market: A marketplace where users trade on the outcome of future events, with prices reflecting collective expectations.
  • Kalshi: A U.S.-based prediction market platform that lets users take positions on event outcomes through regulated contracts.
  • CFTC: The Commodity Futures Trading Commission is the U.S. regulator overseeing derivatives markets, including certain event-based contracts.