Compare the best prediction market and pick’em promo codes for NFL season, including Polymarket, ProphetX, Fliff, Betr, and Rebet offers.
Training camps are underway, the Hall of Fame Game kicked off the preseason on August 6, and prediction markets have become one of the fastest-growing ways to trade on NFL outcomes. Whether you’re trading contracts on a CFTC-regulated exchange or making free picks on a sweepstakes-style platform, there’s a welcome offer worth grabbing before Week 1 arrives on September 9.
Best Prediction Market Promo Codes
| Platform | Offer | Code |
|---|---|---|
| Polymarket | Deposit $10, Get $20 Trading Credit | MRGAMB |
| ProphetX | Trade $10, Get $20 Bonus | MRGAMBLE |
| Fliff | Spend $5, Get $50 in Free Play | MRGAMB |
| Rebet | Deposit Match Up to $100 in Rebet Cash | MRGAMBLE |
| Betr | First Entry Backed Up to $100 | MRGAMB |
18+ (19+ or 21+ in some states). T&Cs apply. Availability and offer terms vary by state. Gambling problem? Call 1-800-GAMBLER.
What Counts as a Prediction Market?
Not everything on this list works the same way, and the distinction matters. Polymarket and ProphetX are federally regulated by the CFTC as designated contract markets, so instead of placing a bet against a sportsbook, you’re buying and selling a contract tied to a real outcome, with the price moving based on what other traders are willing to pay. Fliff and Rebet run on a sweepstakes model instead, letting you make free picks and redeem winnings as prizes under sweepstakes law rather than gambling law. Betr sits closer to daily fantasy sports, built around pick’em-style entries rather than either format above.
That difference is also why some of these platforms are live in states where traditional sports betting isn’t, and why the terminology (trade vs. pick vs. entry) shifts from one to the next.
Polymarket Promo Code: Deposit $10, Get $20
| Promo Code | MRGAMB |
| Welcome Offer | Deposit $10+, get $20 in trading credit |
| Minimum Deposit | $10 |
| Regulator | CFTC (Designated Contract Market) |
| Eligibility | 18+, US resident with valid SSN |
Polymarket is the largest event-contract platform available to US users, with markets spanning NFL, NBA, MLB, NHL, college football and basketball, soccer, tennis, and more. New users who deposit $10 or more through code MRGAMB get a $20 trading credit added automatically. Because Polymarket is regulated at the federal level rather than licensed state by state, its core sports markets stay broadly consistent nationwide.
ProphetX Promo Code: Trade $10, Get $20
| Promo Code | MRGAMBLE |
| Welcome Offer | Trade $10+, get a $20 bonus credit |
| Minimum Trade | $10 |
| Regulator | CFTC (Designated Contract Market & DCO) |
| Available States | 49 states (all except Nevada) |
| Eligibility | 18+ or 19+ depending on state |
ProphetX takes the same regulated-exchange approach, registered with the CFTC as both a Designated Contract Market and a Derivatives Clearing Organization. New users who sign up with code MRGAMBLE, fund their account, and place a qualifying $10 trade unlock a $20 bonus credit. It’s currently available in 49 states, with Nevada the lone exclusion.
Fliff Promo Code: Spend $5, Get $50 in Free Play
| Promo Code | MRGAMB |
| Welcome Offer | Spend $5 on a pick, get $50 in Free Play |
| Minimum Spend | $5 |
| Model | Sweepstakes (Fliff Coins + Fliff Cash) |
| Eligibility | 18+ (19+ in AL/NE, 21+ in MS) |
Fliff runs as a free-to-play social sportsbook covering NFL, NBA, MLB, NHL, WNBA, UFC, and more. New users who enter code MRGAMB, place a $5 pick, and let it settle get $50 in Free Play credited automatically, no separate claim step required. Fliff’s sweepstakes redemption footprint has narrowed in 2026 as more states pass their own sweepstakes laws, so it’s worth checking current state availability before you sign up.
Rebet Promo Code: Deposit Match Up to $100 in Rebet Cash
| Promo Code | MRGAMBLE |
| Welcome Offer | Deposit match up to $100 in Rebet Cash |
| Minimum Deposit | $10 |
| Playthrough | 1x |
| Model | Sweepstakes (Rebet Coins + Rebet Cash) |
| Eligibility | 18+ (21+ in some states) |
Rebet operates as a social sportsbook and casino on a sweepstakes model, letting users make picks with Rebet Coins and redeem winnings as Rebet Cash. New sportsbook users who enter code MRGAMBLE, deposit between $10 and $100, and complete verification get that deposit matched dollar for dollar in Rebet Cash, up to $100. Rebet also runs a separate casino offer (code GAMBLE, 50% match up to $50) for players more interested in slots and table games.
Betr Promo Code: First Entry Backed Up to $100
| Promo Code | MRGAMB |
| Welcome Offer | First entry backed up to $100 (No Sweat) |
| Minimum Deposit | $10 |
| Refund Type | Betr Bucks, 1x playthrough, expire in 30 days |
| Format | Pick’em (DFS) |
| Eligibility | 21+ (18+ in AL, 19+ in CO) |
Betr leans pick’em rather than prediction-market pricing, built around choosing whether a player finishes over or under a projected stat line. New users who sign up with code MRGAMB get their opening entry backed up to $100, if it doesn’t hit, Betr returns the stake as Betr Bucks instead of a straight loss.
How to Claim NFL Promo Code
- Tap the platform’s link above to open the app or continue on mobile web, the code applies automatically through the tracked link.
- Register your account with your name, date of birth, address, and any ID verification the platform requires.
- Fund your account with the minimum amount listed in the table.
- Place your qualifying trade, pick, or entry.
- Once it settles, your bonus lands in your account, ready to use on NFL markets all season.
Prediction Market Promo Codes FAQS
What’s the difference between a prediction market and a sportsbook?
On a prediction market, you’re trading a contract whose price reflects the market’s implied probability of an outcome, and you can buy or sell before the event ends. A sportsbook sets fixed odds and takes the other side of your bet directly.
Do I need to enter these codes manually?
No. Clicking through the links on this page attaches each code automatically, so the offer applies as long as you complete registration and funding through that link.
Are prediction markets legal in states where sports betting isn’t?
Often, yes. Because platforms like Polymarket and ProphetX are federally regulated by the CFTC rather than licensed state by state, they’re broadly available nationwide. Sweepstakes-model platforms like Fliff and Rebet operate under a separate legal framework that also allows access in many states without regulated sports betting.
Which of these offers is best for NFL specifically?
All five cover NFL markets or picks, but the format differs. Polymarket and ProphetX suit traders who want game-by-game and futures pricing, while Fliff, Rebet, and Betr are built around simpler picks without needing to understand contract pricing.
This article contains affiliate links. Trading event contracts and making sweepstakes picks both involve financial risk. Availability, codes, and offer terms vary by state and are subject to change, always confirm current terms in the app before claiming. 18+ (19+ or 21+ in some states). If you or someone you know has a gambling problem, call 1-800-GAMBLER.