The Cardinals and Yankees close their three-game set at Yankee Stadium on Wednesday, August 5 at 7:05 p.m. ET on Prime Video, which leaves the whole day to fund an account. New users who sign up with the Polymarket promo code ACTION turn a $10 deposit into a $20 trading bonus, so you enter the series finale MLB game with $30 in play instead of $10.
Claim the Polymarket Promo Code ACTION Offer
Four steps, about three minutes on your phone:
- Tap any Polymarket promo code ACTION link on this page.
- Register with your name, email, and date of birth.
- Enter code ACTION during signup.
- Deposit $10 or more and collect your $20 trading bonus.
The Polymarket referral code ACTION bonus lands in your account as trading credit, so you get three chances to use it: the $10 you funded plus the $20 bonus on top.
Available states: AK, AL, AR, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IN, KS, KY, LA, ME, MN, MO, MS, NC, ND, NE, NH, NJ, NM, NY, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WA, WI, WV, WY.
Why This Ranks Among the Best MLB Prediction Market Promos
Most sign-up offers ask for $50 or more before they hand you anything. A 2-to-1 match on a $10 deposit sets a very low bar, which makes Polymarket promo code ACTION one of the friendliest entry points for anyone new to prediction markets.
Polymarket also prices contracts between 1 and 99 cents rather than in traditional odds, so your screen shows the implied probability directly. Beginners tend to read that faster.
That combination — tiny minimum, instant match, transparent pricing — puts this among the best prediction market apps to test with real money this week.
Cardinals vs. Yankees: What Moves the Market Wednesday
St. Louis arrived in the Bronx at 56-58 and New York at 64-50, with tonight the rubber game of the three-game set at Yankee Stadium. The Cardinals took the opener 13-7 behind a three-homer, six-RBI night from Alec Burleson, then the Yankees evened it 2-0, with 21-year-old George Lombard Jr. homering in his major league debut.
The money matters more than the records here. At DraftKings, 81% of moneyline tickets are on the Yankees while 78% of the handle is on the Cardinals at +142, and 97% of the money is on Cardinals +1.5 and Under 8.5. Any market treating this as a comfortable New York hold deserves a second look.
New York has a soft spot too. Aaron Judge (rib), Giancarlo Stanton (leg) and Cody Bellinger (leg) are all on the injured list, which thins a lineup that now leans on Ben Rice and his .924 home OPS. Will Warren (8-5, 4.14 ERA) draws Andre Pallante (11-6, 3.72), and Pallante's 17.3% strikeout rate leaves little margin for error — which keeps late-inning and total-runs contracts live.
Two things to check before first pitch: the MLB weather report — Yankee Stadium's short right-field porch has been exploited repeatedly in this series, and wind direction decides whether that matters — and the confirmed MLB lineups, since with three power bats out, who actually fills those slots moves the run projection.
How to Use Your $20 on the Full MLB Slate
Wednesday offers a full MLB card, so treat the bonus like a bankroll instead of a single swing. Split it across the Cardinals vs. Yankees moneyline market and one or two other games, then compare where your read differs most from the crowd's price.
That approach makes the best Cardinals vs. Yankees prediction market promo a learning tool as much as a bonus. You see how prices move once lineups drop and once the wind report firms up.
Ready? Grab the Polymarket referral code ACTION offer before the 7:05 p.m. ET start.
Polymarket Promo Code ACTION FAQs
What is the Polymarket promo code? The code is ACTION. New users who enter it and deposit $10 get a $20 trading bonus.
How much do I need to deposit for the ACTION bonus? $10. The Polymarket promo code ACTION offers a $20 trading bonus on that minimum.
Which states allow Polymarket? Players in 43 states and Washington, D.C. qualify, including CA, NY, TX, FL, PA, and NJ. The full list appears above.
Does the bonus expire? Promotional credit carries an expiration window, so check the terms in your account and use it soon after signup.
Is Polymarket the same as a sportsbook? No. Polymarket runs prediction markets, where you buy and sell contracts against other users rather than taking a price set by a book.
Which prediction market apps offer the best MLB prediction market promos right now? The ACTION offer stands out for its $10 threshold. Compare current promos before you commit, and claim the Polymarket promo code ACTION deal if a low-risk start suits you.
18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See http://polymarket.us/tos for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated derivatives exchange and clearing organization. Not available in AZ, IL, MA, MD, MI, MT, NV, and OH.
