Ahead of today’s highly anticipated NBA Postseason matchup between the Oklahoma City Thunder and San Antonio Spurs, new Polymarket customers can take advantage of an exciting welcome offer by using our exclusive Polymarket promo code STIFFS.
By making an initial deposit of at least $20, users will unlock a $50 sign-up bonus that can be applied directly to tonight’s Thunder vs Spurs clash or used to trade on any other NBA game taking place this week during this crucial round of the playoffs.
Polymarket Promo Code STIFFS Overview
Before the Oklahoma City Thunder and San Antonio Spurs tip off at the Paycom Center on May 20, eligible fans can activate the exclusive offer detailed below.
Exclusively available for new Polymarket customers, this welcome offer provides a fantastic way to dive into the NBA Postseason action. If you are 18+ and located in an eligible Polymarket state, you can claim a $50 sign-up bonus to use on tonight’s pivotal matchup between the Oklahoma City Thunder and San Antonio Spurs at the Paycom Center.
To unlock the offer, simply register your new account and make an initial deposit of at least $20. Once that qualifying deposit is complete, your $50 bonus will be instantly activated and ready to be used. Whether you are backing the Thunder on their home court or predicting a breakout performance from the Spurs, this bonus gives you extra flexibility to navigate the playoff markets.
How to Activate Your Polymarket Promo Code
Getting started and claiming your $50 bonus ahead of the Oklahoma City Thunder and San Antonio Spurs game is a quick and straightforward process. Follow these simple steps to ensure your account is set up and ready before the teams take the court at the Paycom Center:
- Download the App: Navigate to your device’s app store and download the official Polymarket app.
- Register Your Account: Open the app and begin the registration process by entering your standard personal information (such as your name, email address, and date of birth).
- Verify Your Identity: To comply with platform regulations, you will need to provide proof of identification to secure and verify your new account.
- Enter the Promo Code: During the sign-up process, make sure to enter the promo code STIFFS in the designated field to opt into the welcome offer.
- Make a Qualifying Deposit: Complete a first-time deposit of at least $20.
Once your initial deposit clears, your welcome offer will be fully activated. Your bonus funds will immediately be available to trade, so you can settle in, tune into the national broadcast on NBC/Peacock, and enjoy the NBA Postseason action.
Thunder vs Spurs Prediction Markets
If you choose to trade your $50 welcome bonus on the hometown favorite, an Oklahoma City (-249) victory would yield a profit of $20.08, returning a total payout of $70.08. Conversely, if you believe the underdog can steal a win on the road, placing your $50 on the Spurs (+203) would result in a handsome profit of $101.50.
When deciding where to deploy your bonus, a quick look at postseason statistics reveals a much tighter contest than the current moneyline suggests. Both teams have been dominant in the 2025 playoffs, but the Spurs actually hold a slight advantage in key underlying metrics. San Antonio boasts an impressive 15.5 net rating—just edging out the Thunder’s 14.8 mark.
Furthermore, the Spurs have been controlling the glass significantly better, pulling down 53.6% of all available rebounds compared to Oklahoma City’s 50.1%. While the Thunder are favored to win at the Paycom Center, San Antonio’s statistical edge makes their underdog moneyline an enticing option.
