Cleveland Cavaliers vs. New York Knicks tips off at 8 p.m. ET on ESPN this Thursday, May 21, 2026, and the Polymarket promo code ACTION offer is simple: deposit $20, get a $50 trading bonus to add quick buying power for tonight’s NBA Eastern Conference Finals market.
That $50 in promo credits gives you more room to take a position, scale into a contract, or place a second trade across other active markets heading into Memorial Day Weekend. New users who are 18+ can claim the offer with the link below in most US states except AZ, IL, MA, MD, MI, MT, NV, and OH.
Polymarket Promo Code ACTION: Offer Details
The Polymarket promo code is ACTION and was just upgraded heading into Memorial Day Weekend. New users sign up and deposit $20 to receive $50 in bonus funds. This added bankroll can be used across sports or any market currently offered on the platform.
For Cavaliers vs. Knicks (Thursday, May 21, 8 p.m. ET on ESPN), this is a clean prediction-market angle if you’d rather trade contracts than commit to a single all-or-nothing call. You’re buying “Yes/No” shares priced like probabilities, so timing and price movement matter as much as the final horn. The value is straightforward: deposit $20 and unlock $50 in promo credits, giving you more flexibility to size a position on a high-liquidity game market.
This offer fits traders who prefer scaling in, trimming exposure, or taking a second angle if the market moves against their first read. Use it when you want extra buying power for a packed slate of active markets, instead of forcing one oversized trade on Cavs or Knicks. Be sure to use the Polymarket referral code ACTION during account registration and you can compare other options on our best prediction market apps list.
How to Use the Offer for Cavaliers vs. Knicks
Flexibility is the whole point here. If I open a $50 position on the Cavaliers vs. Knicks “Cavaliers to win?” market at $0.40, I start by signing up and entering Polymarket promo code ACTION, then I make the required $20 deposit to unlock the $50 trading bonus. At $0.40 per contract, a $50 position buys 125 contracts (125 × $0.40 = $50). If my position settles Yes at $1.00 after entering at $0.40, profit is $0.60 per contract, so that’s 125 × $0.60 = $75 profit (and $125 back total). If it settles the other way, I lose the position amount, meaning the full $50 I put into that trade.
You don’t have to hold to settlement, either. Say the market moves from $0.58 to $0.66 late in the day and I close early by selling higher than I bought; the gain comes from that $0.08 move per contract (fees, if any, can reduce it). After that, I can apply the $50 promo credits on a separate eligible market on Polymarket, which is why I like spreading it across smaller positions instead of forcing one big take.
- Cap your first-night exposure (for example, don’t put all available funds into one contract).
- Pick an exit plan before you trade: a take-profit price and a max-loss price.
- Avoid doubling down after a bad move; resize instead.
How to Use Polymarket Promo Code ACTION
- Tap this Polymarket sign-up link to start registration in your state.
- Create your account and enter Polymarket referral code ACTION.
- Complete identity verification and log in.
- Deposit $20+ using an approved payment method.
- Get $50 bonus to use on Cavs vs. Knicks or any other market on the platform.
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, NV, and OH.
