Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| Map 1 Winner | 100% |
| Map 2 Winner | 100% |
| Match Winner | 100% |
| Map Handicap: IMP (-1.5) vs Isurus (+1.5) | 100% |
| Map 2 Rounds Handicap: Imperial (-3.5) vs Isurus (+3.5) | 100% |
| Map 1 Rounds Handicap: Imperial (-3.5) vs Isurus (+3.5) | 100% |
| Map 1 Rounds Handicap: Imperial (-6.5) vs Isurus (+6.5) | 100% |
| Map 3 Rounds Handicap: Imperial (-3.5) vs Isurus (+3.5) | 50% |
| Map 3 Total Rounds: Over/Under 21.5 | 50% |
| O/U 2.5 Games | 0% |
| Map 1 Total Rounds: Over/Under 21.5 | 0% |
| Map 1 Total Rounds: Over/Under 24.5 | 0% |
| Map 1 Rounds Handicap: Imperial (-12.5) vs Isurus (+12.5) | 0% |
| Map 1 Total Rounds: Over/Under 18.5 | 0% |
Market context
Imperial and Isurus face off in the BetBoom Storm Playoffs quarterfinal on 13 August, with the match scheduled for 7:00PM ET. The 100% crowd probability reflects Imperial's established standing as the stronger outfit in this South American Counter-Strike matchup. Imperial have consistently ranked above Isurus in regional competition and international circuit appearances, though the specific form of both squads heading into this fixture remains the key variable. The settlement window extends to 14 August at 05:15 UTC, providing a 22-hour buffer beyond the scheduled start time to accommodate any minor delays.
Historical precedent suggests that South American regional playoffs rarely encounter cancellation or extended delays beyond the seven-day threshold. Matches in this circuit typically proceed as scheduled or resolve within hours of the original time slot. The 50-50 tie resolution clause applies only if the match remains unplayed or undecided beyond seven days from 13 August—an outcome that would require significant organisational disruption rather than a competitive draw, as Counter-Strike best-of-three formats inherently produce a winner.
Traders should monitor BetBoom's official schedule confirmations in the 24 hours before the match, particularly any roster changes or technical issues that might affect either team's participation. Recent regional tournaments have proceeded without notable delays, though internet infrastructure in South America occasionally creates scheduling friction. Any announcement regarding player unavailability or venue issues would shift the probability away from the current consensus.
Methodology
This page reviews Counter-Strike: Imperial vs Isurus (BO3) - BetBoom Storm Playoffs across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Today, which mirrors the Polymarket order book at 0% fees.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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 Prediction Today. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- How does resolution work?
- Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
- 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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