New users on major US prediction markets can still access extended Independence Day sign-up bonuses as of Sunday, July 5, 2026.
Both Polymarket and Kalshi have extended their promotional offers.
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According to a report from cleveland. com, Polymarket is offering a $50 promotional bonus to new traders who complete a $20 deposit.
The platform has verified five active codes for this offer: CUSE, SILIVE, OREGON, MASS, and CLEVE.
Concurrently, Kalshi has extended its dollar-for-dollar deposit match program. Users can secure a $10 bonus after spending an initial $10.
The verified active codes for Kalshi include SYRACUSE, SILIVE, OREGONLIVE1, MASSLIVE1, and CLEVELAND.
Registration requires new users to complete identity verification before the promotional funds are credited to their accounts.
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Both platforms utilize a single-string system where referral, invite, and promotional labels function identically during the sign-up process.
High Trading Volumes on Weekend Events
The extension coincides with high trading volumes on weekend events.
A World Cup knockout match between Brazil and Norway has drawn over $639,000 in volume on Kalshi.
Polymarket operates a 90-minute match-result market, while Kalshi tracks the probability of which team advances to the next round.
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Both platforms also maintain active event contracts for the Sunday Major League Baseball schedule, with prices fluctuating based on the announced probable starting pitchers for each matchup.
