Get $25 trading bonus with Polymarket promo code SIBONUS for White Sox-Guardians and Yankees-Rays ALDS matchups on Monday.

Monday, October 5 brings two critical ALDS matchups, and you can trade them on Polymarket with a welcome offer available today. The Polymarket promo code SIBONUS unlocks a $25 trading bonus when you deposit $10. Code SIBONUS is required to claim this offer. You'll trade on the White Sox-Guardians and Yankees-Rays games while accessing prediction market promos across sports and politics.

The Polymarket promo code SIBONUS gives you $25 in trading bonus funds after you meet the offer requirements. You must deposit at least $10 to qualify, and the code is required at registration. Once you complete your first real-money trade on any eligible market, including the White Sox-Guardians or Yankees-Rays games, your bonus credits to your account.

Here are the key terms and conditions you should know:

Let's say you deposit $10 and use your $25 bonus to trade on the White Sox-Guardians matchup. If your prediction wins, you keep the profits after meeting the playthrough requirement. If your trade doesn't go your way, you've only used the bonus funds provided by Polymarket, not your own deposit.

The offer applies to iOS and Android users who register through a qualifying promotional campaign and satisfy all terms. No invitation is required to create a Polymarket account, and you can fund your account using debit card, bank transfer, Apple Pay, or crypto options.

Follow these steps to sign up and place your first trade on Monday's matchups:

Want to learn more about how Polymarket compares to other prediction markets? Read our Kalshi vs. Polymarket review.

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