Polymarket, a global prediction market platform, reports that U.S.-linked wallets accounted for the largest share of political contracts despite the platform’s block on U.S. users. The platform lists the United States as a blocked country and prohibits VPN use, yet blockchain analysis indicates continued activity. Allium Labs said its July 3 report found that U.S.-linked wallets represented about 6% of wallets with country tags but dominated political contracts, representing four times the volume of the next largest country. The top contracts for U.S.-linked wallets involved foreign conflict markets, including the Iran war, while showing less interest in election markets. Rutgers statistician Harry Crane estimated that U.S. users may account for roughly 30% of total Polymarket volume. The report notes that offshore activity raises oversight questions as regulators consider tighter rules for prediction markets. Polymarket faced a $1.4 million CFTC penalty and wind‑down order in 2022, and a recent $2.9 million frontend theft led to promised user refunds. The platform operates a separate U.S.-regulated version with a narrower product set, while the global version continues to attract users from restricted regions. The data may intensify regulatory debate over the effectiveness of geoblocking as prediction markets grow.