World Cup and UFC 329 promo codes from Polymarket, Kalshi, Betr and others

Multiple US‑based prediction‑market platforms are running sign‑up promotions tied to the 2026 FIFA World Cup quarter‑finals and UFC 329. Polymarket offers $50 bonuses for new users who deposit $20, using codes such as STIFFS, BROAD, MASS, FOX, ALCOM and CUSE. Kalshi provides $10‑$15 bonuses with codes including ALCOM15, ELITE15, FOXSPORTS and OREGONLIVE1, requiring a $10‑$15 trade after account verification. Betr gives a $200 “no‑sweat” entry bonus with promo code SOUTH for combined World Cup, MLB and UFC picks. All offers require users to be 18 or older, reside in an eligible US state, and meet the deposit or trade threshold; bonuses are non‑withdrawable and generally expire within 30 days. The promotions cover the England‑Norway and Argentina‑Switzerland quarter‑final matches as well as the Conor McGregor vs. Max Holloway bout at UFC 329, allowing new registrants to trade the outcomes on the respective platforms.