CB measured the bookmaker margin on the same two outright markets — the Super Bowl winner and the Champions League winner — across five crypto sportsbooks, and benchmarked every one against bet365, one of the sharpest mainstream books in the world. The finding: on these markets, Gamdom and Shuffle match bet365 for value, while several other crypto books price four to six points wider — a real, measurable difference in what you keep.
CB measured the bookmaker margin (the "overround") on two outright markets — the Super Bowl winner and the Champions League winner — across five crypto sportsbooks, and compared each to bet365. The result: Gamdom and Shuffle price at roughly a 24% margin, essentially level with bet365 — genuinely competitive with a tier-one operator. Several other crypto books priced the same markets at about 29%, four to six points wider, which is money out of the bettor's pocket. One honest caveat that applies to every book here: these are outright markets, which carry structurally high margins — even bet365 sits above 20%. Single-match pricing runs far lower and was not measured here. And this is about odds value only: bet365 is a licensed, regulated book with consumer protections the crypto sportsbooks do not offer.
Lower margin = better odds = more of your winnings stay yours. It's the single most important, least-advertised number in a sportsbook.
Every set of odds on a market has a built-in bookmaker margin. Convert each price to its implied probability, add them all up, and a fair market would total 100%. The amount over 100% is the overround — the book's edge. A 5% margin on a match is sharp; a 10% margin is poor. On outright markets (who wins a whole tournament), margins are always much higher because the edge compounds across every runner — so even the sharpest books sit in the 20s. What matters is the relative comparison: on the same market, on the same day, who prices tighter. That's what CB measured.
Same markets, same day, every margin calculated from the screenshotted full field of odds.
| Sportsbook | Super Bowl winner | Champions League winner | vs bet365 |
|---|---|---|---|
| bet365 (benchmark) | 21.6% | 24.7% | — |
| Gamdom | 22.8% | 24.7% | Matches bet365 |
| Shuffle | 23.1% | 24.7% | Matches bet365 |
| BC.Game, Duel, Rainbet, Roobet | 28.8% | 29.5% | ~5–6 pts wider |
Margins are normalised on the identical set of teams present on every platform, so field-size differences don't distort the comparison. Figures are point-in-time observations from odds captured on the same day (September 2026), not permanent values — odds move constantly. 1win is not shown: it did not offer these outright markets at the time of the test.
On these markets, Gamdom and Shuffle give you the same value as bet365 — which is genuinely rare for a crypto sportsbook.
The reflex assumption about crypto sportsbooks is that their odds are an afterthought bolted onto a casino. On these two outright markets, that's not true for Gamdom and Shuffle: both priced within about a point of bet365, one of the sharpest and most sophisticated books in the mainstream market. For a sports bettor who cares about long-term value, that's a real endorsement — you're not sacrificing price to bet in crypto on these two. It's the reason both score highly on odds quality in their CB reviews (Gamdom, Shuffle).
A ~29% margin vs bet365's ~23% is about five to six points — and on outrights, that adds up.
The remaining crypto books CB measured — BC.Game, Duel, Rainbet and Roobet — priced these markets at roughly 29%, four to six points wider than bet365. That gap is the bettor's cost: on a market where you're already giving up ~23% to the house, giving up ~29% instead means keeping meaningfully less of your expected value over time. It doesn't make these bad platforms — several rate well overall in their CB reviews on speed, fees and privacy — but on sports odds specifically, they're the weaker choice on these markets, and their odds scores reflect that.
Two things this investigation is not saying.
These are outright markets, so the margins are high across the board. Even bet365 sits above 20% here — that's normal for "who wins the whole tournament" bets, where the margin compounds across a large field. Single-match markets (a 1X2 result on one game) run far lower, often in the low single digits. CB did not measure match markets in this investigation, so these figures describe outright value specifically, not a sportsbook's pricing across the board.
This is about odds value, not overall safety. bet365 is a licensed, regulated operator with consumer protections, dispute resolution and guaranteed payouts that offshore crypto sportsbooks generally do not offer. "Sharper odds" is one dimension; it is not the same as "safer" or "better overall." A bettor choosing where to play should weigh the odds finding here alongside the withdrawal, KYC, fee and licensing findings in each platform's full CB review.
For each sportsbook, CB captured the full field of odds on the same two markets (Super Bowl winner and Champions League winner) on the same day, converted every price to its implied probability, and summed them to get the margin. To compare fairly, CB normalised each book to the identical set of teams present on all platforms — because a book listing more longshots would otherwise show a higher margin purely from field size, not from worse pricing. bet365's fractional odds were converted to decimal for a like-for-like comparison. Every figure traces to a captured screenshot. As with all CB data, these are point-in-time observations; odds change constantly, and the comparison reflects one snapshot, not a permanent ranking.
Odds captured September 2026 on the Super Bowl LXI and Champions League 2026/27 winner markets. Figures are point-in-time and calculated from screenshotted odds; verify current prices before betting. This is CB's measurement, not a guarantee of future pricing.