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  "path": "/betting/2026/06/kalshi-and-polymarket-referral-codes-upgrade-50-bonus-from-prime-day-updated-mlb-and-world-cup-odds.html",
  "publishedAt": "2026-06-29T13:59:00.000Z",
  "site": "https://www.cleveland.com",
  "textContent": "The verified Polymarket and Kalshi invite and promo codes from Prime Day remain available through the end of June — $70 to trade on Polymarket, $20 on Kalshi — with three World Cup knockout matches and a Texas–Cleveland MLB market live on the board today.",
  "title": "Kalshi and Polymarket “referral codes” upgrade $50+ bonus from Prime Day; Updated MLB and World Cup odds"
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