Coinbase is under fire from users following delays in payouts for its Super Bowl "Big Game Challenge" prediction market contest. Participants who qualified for Bitcoin prize shares reported missing or delayed payments, with some users experiencing discrepancies between initial win confirmations and subsequent notifications of ineligibility. Coinbase has stated that verified winners will receive their Bitcoin rewards by February 23, 2026, but the lack of transparency has frustrated users. The issues coincide with broader challenges in crypto prediction markets, as partner platform Kalshi faced transaction delays due to high traffic during the Super Bowl. These operational strains highlight the scalability challenges for platforms during major events. Additionally, regulatory hurdles persist, with state gaming regulators challenging the legality of such prediction markets, complicating their rollout and user experience.