The Vault
Sports, props, and the honest edge.
Six full reviews, the vig printed on every one, and a straight answer to the question this whole category dances around: what do you do if your state has no legal sportsbook?
Start here: what each product costs you
Everything in the Vault is a way of turning an opinion about a game into money. They differ enormously in how much they charge for the privilege, and almost nobody prints the number. So we will.
Approximate house margin by product type
| Product | Roughly what the house keeps | Why |
|---|
| Sportsbook — straight bet | ~4.76% | Standard −110 pricing on both sides of a spread. |
|---|
| Sportsbook — 4-leg parlay | High teens | Each leg's margin compounds. Same-game parlays add a correlation markup. |
|---|
| DFS pick-em — 2-pick | ~25% | Fair odds on two coin flips are 4×; these typically pay about 3×. |
|---|
| Prediction market | Capped fee + spread | Peer-to-peer, so no built-in margin — but thin markets have wide spreads, and a spread is a cost. |
|---|
The parlay and pick-em figures are derived from first principles rather than quoted from an operator — the arithmetic is in each review. The honest headline: the simplest, most fun-looking product is usually the most expensive one, often by a factor of five.
The thing nobody explains about "bonus bets". A promotional bonus bet is stake-not-returned. Win a $100 bonus bet at −110 and you collect the $90.91 of profit — not the $190.91 a real $100 bet would return. The stake evaporates whether you win or lose. So a "$100 bonus bet" is worth substantially less than $100 of your own money, and any headline offer quoted in bonus bets should be mentally discounted before you compare it with anything.
Prediction markets: the 2026 shift
This is the most important development in US sports wagering since legalisation began, and it barely gets covered honestly, so here's the whole picture.
Prediction markets — Kalshi, Polymarket, and now products from the big books themselves — let you trade contracts on the outcome of an event. They're regulated federally by the Commodity Futures Trading Commission rather than by state gambling regulators, and federal commodities regulation doesn't stop at state lines. That's the entire reason they matter: they reach states where sports betting is illegal.
Both giants have moved in:
- FanDuel Predicts launched 22 December 2025 with CME Group, starting in Alabama, Alaska, South Carolina, North Dakota and South Dakota. By January 2026 it was live in all 50 states. Crucially, it offers sports contracts only where FanDuel has no sportsbook — in roughly 32 states it carries finance and commodities contracts only, and FanDuel has said it will pull sports contracts from states that legalise betting.
- DraftKings launched its own prediction exchange in June 2026.
How the pricing differs
A sportsbook takes the other side of your bet and builds a margin into the odds. A prediction market is peer-to-peer: you're trading with another participant, and the platform charges a capped transaction fee instead. In principle that's cheaper than paying 4.76% vig.
In practice, watch the bid-ask spread. The gap between what buyers will pay and sellers will accept is a real cost, and on a thin market it can dwarf what a sportsbook would have charged you. Liquidity is the thing to check before assuming you're getting a better price. Fee structures also differ — on some venues limit orders cost less than market orders.
The legal picture, honestly
Technically legal nationwide under CFTC regulation — and roughly thirteen states had active enforcement, litigation, or both as of August 2026. This is genuinely unsettled law, not a settled workaround.
- The CFTC sued Arizona, Connecticut and Illinois on 2 April 2026, seeking to block state enforcement against Kalshi and Polymarket.
- New York — a federal judge denied Kalshi's motion for a preliminary injunction, ruling that New York's gambling laws are not preempted by the Commodity Exchange Act.
- Tennessee — a court held Kalshi likely to succeed, treating sports event contracts as swaps.
- Minnesota — signed a first-of-its-kind law in May 2026 criminalising prediction-market operation, due to take effect 1 August; days beforehand a federal judge granted a preliminary injunction pausing it.
- CFTC proposed rule, 10 June 2026 — would permit most sports event contracts on price-discovery grounds while banning those most vulnerable to manipulation: individual player injuries, referee decisions and specific in-game events.
What that means for you: courts are actively disagreeing, a federal rule is mid-process, and the answer in your state may change during a single season. Prediction markets are a legitimate route where you can use them — and not a settled one.
No legal sportsbook in your state? Your actual options
If you're in California, Texas, Florida, Georgia or anywhere else without a licensed book, you have three legal-ish routes and one bad one:
- Prediction markets. The most direct substitute, federally regulated, and reaching all 50 states — with the litigation caveats above. FanDuel Predicts carries sports contracts specifically in states like California and Texas because they have no sportsbook.
- DFS pick-em apps. Legal in many non-betting states under fantasy rules. Reviewed above — and roughly five times more expensive than a sportsbook straight bet, which is the trade you're making.
- Sweepstakes sportsbooks. No purchase necessary, dual-currency model. Two sweeps casinos run a real book alongside the games and we compared them; a third option, Rebet, is a standalone social sportsbook with wider state reach that we haven't reviewed yet.
- Offshore books — don't. No US regulator has jurisdiction, which means no recourse when a withdrawal stops arriving. The three routes above all have a regulator somewhere in the picture. That difference only matters on the day it matters, and then it matters entirely.
How we review these
Same rules as the casino floor, with one addition specific to this category.
We print no welcome-offer amounts anywhere in the Vault. Sportsbook promotions change weekly and are frequently quoted in bonus bets, which are worth less than their face value. A stale bonus figure is the most common lie in affiliate content, and we'd rather have an empty field than a wrong number. When we verify an offer, it'll carry the date we checked it — exactly like the casino reviews.
Everything else — state counts, regulatory actions, settlement figures, withdrawal timings — carries the month it was checked, in the copy, where you can see it. State lists in this category moved several times in 2026 and will move again. If a number matters to your decision, confirm it in the app before you rely on it.
