Polymarket Promo Code SIBONUS: Get $20 Trading Bonus for MLB & WNBA

Tuesday, August 11 brings a loaded MLB slate and a marquee WNBA matchup, making it the perfect time to explore Polymarket promo code offers. New users can claim a $20 bonus when they deposit $10 and enter code SIBONUS during registration. This welcome offer lets you start trading on prediction markets immediately, including the night's biggest baseball and basketball events. Check out prediction market promos to see what other platforms offer.

How the Polymarket Promo Code SIBONUS Works for Tuesday's Games

The Polymarket promo code SIBONUS requires you to deposit a minimum of $10 to unlock your $20 trading bonus. Unlike traditional sportsbooks, Polymarket operates as a prediction market platform where you trade on outcomes rather than place standard wagers. Once you claim your bonus, you can immediately apply those funds toward trading on Tuesday's slate, from the Mariners-Yankees matchup to the Liberty-Fever showdown.

Here are the key terms and conditions for claiming this offer:

Available in all U.S. states except Nevada
You must be physically located in an eligible state
Enter promo code SIBONUS during sign-up
Provide valid photo ID (driver's license or passport) and a selfie holding that ID
Make an initial deposit of $10 to activate the bonus

When you trade on Tuesday's games, your $20 bonus gives you real capital to work with. If you predict the Brewers-Padres outcome correctly, your winnings add to your account balance. If your trade doesn't go your way, you've only used the bonus funds provided by Polymarket, not your own deposit. The platform's diverse market options extend beyond sports, covering politics, entertainment, economics, and more, setting it apart from traditional prediction platforms.

How to Claim Your SIBONUS Bonus and Start Trading Tuesday's Games

Getting started with Polymarket takes just a few minutes. Follow these steps to claim your welcome offer and begin trading on Tuesday's MLB and WNBA action:

Visit Polymarket and register: Navigate to Polymarket's sign-up page and click the registration button. Enter your personal information, including your date of birth, phone number, and current location. Make sure to type in promo code SIBONUS during this step to unlock your bonus eligibility.
Verify your identity: Polymarket will request proof of identity. Prepare a clear photo of your driver's license or passport, along with a selfie showing you holding that ID. You may also need to provide your Social Security Number. Submit these documents through the verification portal.
Deposit $10: Once verified, access your Polymarket wallet and click the "Deposit Cash" button. Select your preferred payment method and enter a deposit amount of $10. Confirm the transaction to activate your account.
Claim your $20 bonus: After your deposit processes, your $20 trading bonus will appear in your account. You're now ready to trade on Tuesday's games, starting with the early-evening cluster of Mariners-Yankees, Red Sox-Blue Jays, and Mets-Braves.
Place your first trades: Browse the available markets for Tuesday's MLB games and the Liberty-Fever WNBA matchup. Select the outcomes you want to trade on, enter your trade size, and execute. Your bonus funds are immediately available for trading.

Ready to explore prediction markets? Read our Kalshi vs. Polymarket comparison to see how this platform stacks up against competitors.

Trading is risky, always trade responsibly. If your activity is becoming a problem, support is available by calling 1-800-522-4700.

Add us as a preferred source on Google