CoinEx News: A June 21 Wall Street Journal investigation found Polymarket — the largest crypto-native prediction market, where users bet on yes/no outcomes of real-world events and settle in USDC on Polygon — paid creators a few thousand dollars a month to post videos of themselves landing big winning bets. Around 1,100 clips were filmed on near-perfect copies of its site, with the trades and profits staged, and creators were told to hide the payments; some added a "@polymarket partner" tag to their profiles only after reporters started asking. Polymarket said it is committed to "accurate, fair, and transparent markets" and plans to audit its promotional materials.