The Polymarket promo codeACTION gives new users a $50 trading bonus after a $10 deposit, and Monday night's Marlins-Nationals matchup gives you an immediate market to trade it on.
The Marlins (69-68) and Nationals (65-74) finish their four-game series Monday at 6:45 p.m. ET on FS1, with Polymarket pricing the matchup almost exactly as a coin flip. Miami trades around 51 cents to win, while Washington sits at 50 cents.
Claim Polymarket promo code ACTION before depositing and you'll have $60 total to work with — your $10 deposit plus $50 in trading credit. No qualifying first trade on Marlins vs. Nationals is required to unlock the bonus, so the promotional funds are available without needing your opening position to win or settle first.
Polymarket Promo Code ACTION Full Offer Details
| Promo Code | Bonus | Legal States |
|---|---|---|
| ACTION | Deposit $10, Get a $50 Trading Bonus | 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, WI, WV, WY |
Florida is on the eligible-state list, so Marlins fans can claim the offer. The promotion is available across most of the country, giving it one of the broader footprints among current prediction market promos.
How the Polymarket Promo Code ACTION Works
This one does not make you jump through many hoops. Enter Polymarket promo code ACTION during registration, make a first deposit of at least $10 and Polymarket credits $50 in trading funds after the deposit clears. You do not need your first trade to win, lose or settle before the bonus triggers.
Polymarket uses event contracts instead of traditional sportsbook bet slips. A contract generally trades between one and 99 cents and settles at $1 if the outcome occurs or zero if it does not.
So if Miami is trading at 51 cents tonight, the market is effectively giving the Marlins about a 51% chance to win. Fifty dollars of promotional credit at 51 cents buys roughly 98 contracts, giving you enough bonus funds to spread across several markets rather than putting everything into one position.
That ability to enter and exit positions is one of the main differences between Polymarket and a conventional sportsbook. If you want more exchange options, our prediction market apps guide breaks down how the major platforms compare to one another.
Marlins vs. Nationals Contract Prices
Check out live Polymarket MLB odds for Marlins vs. Nationals below:
| Outcome | Polymarket Price | Implied Probability |
|---|---|---|
| Marlins to win | 51¢ | 51% |
| Nationals to win | 50¢ | 50% |
I prefer Miami, but this is not a position I would overbuy.
- Marlins vs. National prediction: Marlins to win at 51¢
The Marlins have the better record, have won nine of 12 against Washington this season and get the more conventional starting-pitching setup. Gusto has also been pitching substantially better than his season ERA over the past month.
Washington's case is straightforward too. Dion has been effective, the Nationals are at home and a 50-cent price only asks them to win half the time. This is priced like a close game on prediction markets because it should be one.
There are also plenty of other games on the MLB schedule Monday if this contract moves away from the number you want.
Conclusion
Polymarket's offer is simple enough: deposit $10 with Polymarket referral code ACTION, get $50 in trading credit and decide where you want to put it.
Marlins-Nationals is a good first market because there is very little separating the teams on the board. I prefer Miami at 51 cents, but this is exactly the kind of position where checking the live price before you buy matters more than forcing a pick because you have bonus funds available.
Claim the Polymarket promo code ACTION before depositing, then check the Marlins price again as first pitch approaches.
Polymarket Terms and Conditions
18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading involves high risk and may result in loss of your entire investment. See 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, OH, and WA.
