Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Review UK) Pick polygram.ink (preferred broker) |
87% | 13% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
87% | 13% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| August 31 | 87% |
| August 26 | 78% |
| August 20 | 46% |
| August 21 | 46% |
| August 19 | 40% |
| August 18 | 25% |
| August 14 | 6% |
Market context
Kai Cenat and IShowSpeed are running a hardcore Minecraft marathon that began on 7 August at 5 p.m. ET, with Kai’s Twitch channel being the resolving feed for this market. The key operational detail for traders is that the market only resolves **Yes** if Kai ends his Twitch broadcast of the marathon before the settlement deadline and does not resume it within 12 hours, so a temporary pause or a channel switch would not automatically count as a finish.
The closest comparable case is their 2024 hardcore Minecraft marathon, which ran for roughly 105-106 hours, included 42 deaths and resets, and ended only after they finally beat the Ender Dragon. That history is a useful baseline for modelling duration: the pair have shown a willingness to continue for multiple days, but they have also repeatedly lost progress, making the tail risk of a much longer run material rather than theoretical.[2][4][5][8][13] For anyone automating this market, that means the probability should be read as a function of stream state rather than headline intention: continuous live status, whether the Minecraft run is still active, and whether the broadcast has ended for more than 12 hours are the decisive variables.
The main catalysts are straightforward to monitor programmatically: the official start time, any schedule updates from the streamers, and whether the format is still the previously reported “hardcore” challenge or has been changed mid-run. Recent previews ahead of the 7 August launch said the pair would go live at 5 p.m. ET and warned that even a similar run length to 2024 could push the finish into 11 August, while other coverage noted the challenge could extend far longer if they keep restarting.[16][17] For a bot or conditional-order setup, the cleanest trigger is a live-status watcher on Kai’s Twitch channel plus a timer that enforces the 12-hour no-resume rule before treating the stream as ended.
Methodology
We track Kai and Speed finish their Minecraft marathon by 2026? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Review UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- Is Polymarket legal in the UK?
- Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.
- Do I pay tax on prediction market profits in the UK?
- UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.
- How do I deposit on Polymarket from the UK?
- UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.
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