The End of Category Lines: When DFS, Sports Betting, and Prediction Markets Collide

In 2018, the Supreme Court's PASPA decision restored authority to states to legalize sports betting. But it did not clarify how states should regulate distinct but overlapping betting categories. Daily fantasy sports, which had grown into a $8 billion industry, occupied a unique legal status: it was skilled-based wagering on sports, but not technically "sports betting." Sports betting was wagering on the outcome of real games. DFS was wagering on the aggregate performance of a roster of real players. The line seemed clear, even if the distinction was philosophically thin.

Then operators began erasing the line.

PrizePicks and Underdog, the largest daily fantasy platforms, noticed something obvious: their products could be restructured as peer-to-peer prediction markets where players directly wager against each other (rather than against the house) on whether an NFL quarterback will throw more or fewer than 300 yards. The regulatory advantage was significant. If your product was peer-to-peer prediction markets (not sportsbooks), you might not need a sports betting license in some states. You might operate under DFS licensing, or under no specific license at all.

Starting in late 2024, PrizePicks began shifting toward an "Arena" model—a peer-to-peer marketplace where users place predictions directly against each other. Underdog followed suit. The products looked identical to sports betting from a consumer perspective. But structurally, they were prediction markets. And prediction markets, depending on jurisdiction, might be exempt from sports betting licensing requirements.

Arizona took notice. In early 2026, the Arizona Department of Gaming issued a cease-and-desist order to Underdog, arguing that the company was operating as a sportsbook without a license, regardless of the peer-to-peer structure. Underdog appealed, arguing that peer-to-peer prediction markets on sports events were distinct from sports betting. The argument succeeded. Arizona's cease-and-desist was challenged in court, and a New Jersey appellate court (Third Circuit) issued a decision in April 2026 saying that Arizona cannot enforce licensing restrictions on interstate prediction market platforms when those platforms operate on federal commodity contracts. The decision was narrow, but its implications are massive: states may not be able to regulate prediction markets on sports events even if they can regulate traditional sports betting.

This decision signals that the regulatory framework governing DFS, sports betting, and prediction markets is undergoing fundamental reorganization. And the reorganization creates extraordinary uncertainty for operators.

Here is what happened next. PrizePicks, sensing the legal shift, began striking deals with prediction market platforms. By April 2026, PrizePicks had partnerships with Kalshi and Polymarket to source event contracts for its peer-to-peer Arena model. These contracts exist on federal commodity futures exchanges (Kalshi) or unregulated prediction markets (Polymarket). By outsourcing the contract underlying to a prediction market operator, PrizePicks could argue that it was not itself operating a sportsbook—it was operating a peer-to-peer matching engine for contracts provided by prediction market operators.

The strategy was brilliant from a regulatory arbitrage perspective. It allowed PrizePicks to operate in roughly 35 states where sports betting was not legally available (or was heavily restricted), by claiming that its product was not sports betting but prediction markets on sports events. The distinction is technically accurate but completely opaque to consumers.

Meanwhile, the NBA signed PrizePicks as an official DFS partner, lending the product legitimacy. If the NBA endorses it, regulators are less likely to crack down, the logic goes. And that logic has worked—so far.

But the larger implication is unsettling. If prediction markets on sports events can operate without sports betting licenses (as the Third Circuit suggested), and if DFS platforms can operate as prediction market facilitators, then the entire licensing and tax framework that states built around sports betting becomes irrelevant. A state might legalize sports betting and expect to collect licensing fees and taxes. But if operators simply convert the product into a prediction market architecture and source contracts from federal exchanges or unregulated platforms, the state collects nothing.

This is not hypothetical. Multiple operators are now planning DFS-to-prediction-market conversions. The regulatory arbitrage is too attractive. States are beginning to notice, and the response is likely to be aggressive.

New Jersey's courts have signaled that prediction markets on sports events may be federally preempted. But other states will disagree. Massachusetts, which banned DFS, is unlikely to allow it back under the prediction market label. Connecticut, which has explicit prohibition on remote sports betting, will likely argue that sports-event prediction markets constitute banned betting. The jurisdictional fragmentation will create a patchwork that operators can barely navigate.

The category collapse reflects a deeper truth about modern gaming regulation: regulators regulate based on form (sports betting license, DFS license, prediction market exemption), not substance. If a product allows consumers to wager money on sports outcomes with random results, it is betting on sports—regardless of whether the architecture is sportsbook, peer-to-peer, or prediction market. But the current regulatory system does not clearly draw that line.

For DFS operators and prediction market platforms, the path forward is uncertain. For states and regulators, the implication is clear: if you want to tax and regulate sports wagering, you need to define what wagering is based on substance (money wagered, sports events covered, random outcomes), not form (licensing category). If you do not, operators will simply reorganize their products around the regulatory definition and escape oversight entirely.

Legal Landscape

The collision of DFS, sports betting, and prediction markets creates several distinct regulatory risk zones:

**Substance vs. Form in Regulatory Definition**: States define "sports betting" in many different ways. Some define it by licensing category (you need a sports betting license). Others define it by activity (wagering on real sports outcomes). Still others define it by result distribution (house takes a margin vs. peer-to-peer). Operators are exploiting these distinctions. **Recommendation**: If you operate a product that allows consumers to wager money on sports outcomes, assume it will be classified as sports betting in at least half the states where you intend to operate, regardless of the product architecture. Design your licensing strategy around the assumption that regulatory bodies will harmonize toward substance-based definitions within 12-18 months. Structure your product to be compliant with the strictest possible sports betting licensing requirements, then argue for deregulation based on alternative structures in permissive jurisdictions.

**Federal Preemption Strategy**: The Third Circuit's April 2026 decision suggested that federal commodity markets preempt state sports betting restrictions on prediction markets. However, this decision is not binding nationally, and many other circuits have not weighed in. **Recommendation**: If you are operating a prediction market on sports events, assume that state-level litigation is likely. Federal preemption is not guaranteed. Maintain active litigation monitoring in all states where you operate. Be prepared to defend your product against cease-and-desist orders. Consider seeking declaratory judgment from federal courts in jurisdictions where your regulatory status is unclear.

**Licensing Category Risk**: DFS platforms that convert to peer-to-peer prediction markets are assuming they can operate under different licensing frameworks (DFS license vs. prediction market exemption). But regulators may require sports betting licenses for any product involving wagering on sports events. **Recommendation**: Contact the gaming regulator in every jurisdiction where you operate and seek explicit written confirmation of your licensing requirements. Do not assume that a prediction market architecture exempts you from sports betting licensing. If you operate without the required license and regulators challenge you, the fines can be severe and the product shutdown can be immediate.

**Contract Sourcing and Liability**: If you operate a peer-to-peer matching engine but source contracts from prediction market operators, you may be liable for the legality of those contracts in your jurisdiction. If Kalshi or Polymarket's contracts on sports events are ruled illegal in your state, you may face secondary liability. **Recommendation**: Vet your contract sources carefully. Maintain written legal opinions documenting the legal status of each contract in each jurisdiction. If a contract source faces regulatory challenges in a state where you operate, immediately delist those contracts. Maintain audit trails documenting your efforts to comply with contract legality requirements.

**Tax and Licensing Revenue**: States that allow sports betting expect to collect licensing fees and tax revenue. Operators that convert to prediction markets may reduce the tax base. Some states are beginning to amend definitions of "sports betting" to include all wagering on sports outcomes regardless of platform architecture or contract source. **Recommendation**: Assume that states will harmonize their definitions of sports betting to close prediction market loopholes within 24 months. Budget for the cost of obtaining proper sports betting licenses in all jurisdictions where you operate. Do not rely on regulatory arbitrage as a long-term strategy.

**Timeline**: The Third Circuit decision in April 2026 will likely trigger challenges in other circuits. Expect 2-3 additional federal court decisions on sports-event prediction markets in 2026-2027. Expect 5+ additional states to explicitly restrict or regulate sports-event prediction markets. By late 2027, the category boundaries will likely have solidified around substance-based definitions (any wagering on sports outcomes is sports betting), not form-based distinctions (licensing category).