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03FAQ

Frequently asked questions.

The questions investors operators, and journalists ask us most. Answered plainly, with sources where they exist.

Category basics

What is a prediction market?#

A prediction market is a peer-to-peer exchange where users trade binary contracts on real-world outcomes. Each contract pays $1 if the specified event occurs and $0 if it does not. The market price between $0 and $1 represents the crowd's implied probability.

Are prediction markets the same as sports betting?#

No. A sportsbook is a dealer that takes the opposite side of every wager and earns a spread. A prediction market is an exchange that matches users with each other and earns a flat fee. The economic structure, margin profile, and regulatory perimeter are all different.

How big are prediction markets today?#

According to NEXT.io's March 2026 report, monthly trading volume across major prediction-market platforms grew from less than $100m in early 2024 to more than $13bn in December 2025.

Are prediction markets gambling?#

Functionally they resemble gambling. Legally, the answer depends on jurisdiction and contract type. In the US, the CFTC treats listed event contracts as derivatives; several state gambling regulators argue that sports event contracts are gambling under state law. The dispute is unresolved.

Legality

Can I run ads for Polymarket or Kalshi in the US?#

Depends on the channel, the jurisdiction, and the partner's compliance posture. State-level restrictions on gambling advertising apply where the contract is treated as gambling. Geo-compliance and partner-approved creative are mandatory.

What is federal preemption?#

The legal doctrine that federal law overrides conflicting state law. Kalshi argues CFTC registration preempts state gambling law over its event contracts. The Supreme Court has not yet ruled on the question.

Platforms

Polymarket vs Kalshi — what's the difference?#

Polymarket settles in USDC on Polygon, dominates politics and culture markets, and operates primarily offshore. Kalshi is a CFTC-registered US venue settling in USD, with aggressive expansion into sports event contracts. Both are exchange-structured; the regulatory and settlement layers differ.

How do prediction markets make money?#

Exchanges earn a take rate — typically 1–4% — on each trade. They do not hold inventory in the contracts themselves, so revenue is volume-driven rather than outcome-driven.

Investing

How should investors value prediction-market platforms?#

Closer to exchange comparables (CME, ICE, Nasdaq) than to sportsbook comparables (DraftKings, Flutter). Exchanges trade at 6–12x EV/Revenue; sportsbooks at 2–4x. Anchoring a prediction-market venue to a sportsbook multiple is a common analytical error.

Operating

What does CAC look like for prediction-market affiliates?#

Currently materially lower than sportsbook affiliate CAC, because the category has been growth-driven by earned media and organic search rather than scorched-earth bonus marketing. This gap will compress over time as competition intensifies.