Polymarket promo code GRINDERS: Get $20 bonus to trade MLB Opening Night, March Madness
Register now with our RotoGrinders Polymarket promo code GRINDERS to claim a $20 new player bonus. Skip the waitlist and create your account on this prediction market app in all states besides AZ, IL, MA, MD, MI, MT, NJ, NV and OH.
Gain access to one of the best prediction market apps in North America thanks to our Polymarket invite code GRINDERS today, Wednesday, March 25, 2026. Once you’re in, deposit $20 into your account to gain access to $20 in bonuses.
Trade on any sporting event today, such as the Yankees vs. Giants in the MLB (8:05 p.m. ET on Netflix). Another option is to trade on the Sweet 16 of March Madness, which picks back up Thursday. Regardless of what you plan trade on, you must first tap the module above to sign up with the Polymarket promo code GRINDERS.
Use Polymarket promo code GRINDERS to trade Yankees vs. Giants and Sweet 16 prediction markets
Our Polymarket promo code GRINDERS is the key you must use to skip the waitlist while Polymarket is still in beta mode. Simply tap the module below to redeem our Polymarket invite code GRINDERS on your mobile device, deposit $20, and redeem your $20 in bonus funds.
Let’s say the Yankees vs. Giants MLB game tonight interests you. An expert Yankees vs. Giants prediction I like tonight is Yankees moneyline (-128). The reasoning behind this expert MLB pick is due to the Yankees being the more athletic team, having the better offense and likelihood that Logan Webb doesn’t pitch deep for the Giants..
If March Madness and the college basketball scene is more your speed, the Round of 16 awaits to be traded on. Trade on any of these eight NCAA Tournament games below once you sign up at Polymarket:
- Texas vs. Purdue: Thursday at 7:10 p.m. ET on CBS
- Iowa vs. Nebraska: Thursday at 7:30 p.m. ET on TBS
- Arkansas vs. Arizona: Thursday at 9:45 p.m. ET on CBS
- Illinois vs. Houston: Thursday at 10:05 p.m. ET on TBS
- St. John’s vs. Duke: Friday at 7:10 p.m. ET on CBS
- Alabama vs. Michigan: Friday at 7:35 p.m. ET on TBS
- Michigan State vs. UConn: Friday at 9:45 p.m. ET on CBS
- Tennessee vs. Iowa State: Friday at 10:10 p.m. ET on TBS
How do you sign up with Polymarket?
Follow the step-by-step instructions below to register with the Polymarket promo code GRINDERS. Once you register, read up on the ways prediction market platforms implement new rules to promote fair trade.
1. Use the following link to download the Polymarket mobile app on your iOS or Android device and skip the waitlist.
2. Tap “I Have an Invite Code” and enter the Polymarket promo code GRINDERS.
3. Continue sign-up via your Apple or Google account information.
4. Enter a username and agree to the Polymarket legal agreements.
5. Insert your date of birth, phone number, and verification code sent to your device (you must be 18+ to play).
6. Verify your personal identifying information.
7. Make a $20 deposit to unlock a $20 new player bonus.
Kalshi vs. Polymarket
Polymarket is one of the top prediction market apps to trade on the MLB and March Madness with. After all, MLB and Polymarket have a partnership with one another. If you’re wondering how Kalshi vs. Polymarket compare to one another, here are some of the most important pieces of information to note:
- Kalshi is federally regulated, fiat-based and legal in the U.S. Polymarket is also federally Regulated (via QCEX), is crypto-based, and available in the U.S. and internationally.
- Polymarket provides twice the bonus as Kalshi. You get $20 in bonus funds on Polymarket, compared to $10 with the Kalshi promo code GRINDERS.
- Trading Experience: Kalshi provides simple and fiat-based trading to users, while Polymarket caters to crypto-savvy users.
With that said, you can’t go wrong signing up with either of these prediction market apps today. Register with our Polymarket promo code GRINDERS now to get in on the action.
Must be 18 years or older and have a legal, U.S. residential address within the applicable state, D.C., or U.S. territories. Not available in AZ, IL, MA, MD, MI, MT, NJ, NV and OH.
Image Credit: RotoGrinders Network