Polymarket Codes Give New U.S. Users $20 Bonus and Shift Live MLB Prices

Overview

• Polymarket is offering a $20 trading bonus that posts as immediately tradable funds after a $10 first deposit when new U.S. users enter a verified referral code at signup.
• Verified, state-targeted codes such as OREGON and CUSE must be entered during registration and are limited to new Polymarket US accounts with identity and residency checks required.
• Reporters found those credited balances moving live MLB markets on the platform, with example quotes showing favorites and underdogs shifting as new bonus-funded accounts traded.
• The promotion raises consumer-protection concerns because bonus funds create instant liquidity that can distort peer-to-peer prices and expose inexperienced users to fast losses if KYC or state limits are not strictly enforced.
• Polymarket’s peer-to-peer orderbook behavior differs from regulated exchanges like Kalshi, and regulators, publishers, and users should watch whether the bonus-driven volume is temporary or causes lasting market effects.