Kalish Twitter Tirade, Polymarket Parlays Mark Tumultuous Week

DraftKings co-founder Matt Kalish began a series of posts last weekend criticizing prediction markets for their marketing, regulation and scale compared with sportsbooks. The posts included personal attacks and profanity and prompted backlash from members of the sports-betting community. A podcast published reporting that tied details about Kalish’s DraftKings stock holdings to the timing of his comments, raising questions about possible financial motives.

Polymarket notified the Commodity Futures Trading Commission that it will offer multi-leg markets and used the term “Combinatoric Athletic Outcome Contracts” to describe the products. The label drew criticism from some industry figures, with one calling it “peak obfuscation through nomenclature.” The filing arrived during a period of heightened regulatory and legislative scrutiny of prediction markets.

Republican senators pressed a senior advisor to a prediction markets trade group during a subcommittee hearing on sports betting this week. Senators Ted Cruz, Marsha Blackburn and John Curtis questioned the advisor about oversight and consumer protection for prediction exchanges and multi-leg markets.

In California, San Francisco Superior Court Judge Richard Darwin issued a preliminary injunction blocking enforcement of new state rules that would have prohibited blackjack-style games at cardrooms. The injunction halts enforcement for 45 days, and a further court hearing is scheduled for June 30. Cardrooms may continue offering blackjack while the case proceeds.

Markets on the reality show Survivor shifted sharply toward contestant Aubry Bracco before the season finale, moving from about a 75% probability when one operator opened a market to roughly 98% by the final episode. The operator said an internal review found no evidence of insider wrongdoing. Some bettors and commentators urged platforms to stop offering markets on events filmed long before they air.

DraftKings closed its Wrigley Field sportsbook, citing heavy tax burdens in Illinois and low foot traffic at the venue. The closure follows recent shutdowns at stadium-adjacent sportsbooks tied to several professional sports teams. Operators continue to emphasize mobile betting products.

A gambling industry analysis found users lost more than $100 million on parlays this year at one operator. A separate publication later posted the same figures, then removed the story and the author page; that publication stated the author is an independent publisher and denied using artificial intelligence to produce the piece.

Circa Sports raised the guaranteed combined prize pool for three NFL pick-’em contests — Circa Survivor, Circa Million VIII and Circa Grandissimo — to $30 million and noted it takes no rake on those contests. Jackpot sizes will increase if entry fees exceed the guarantees.

A June 30 hearing is set in the California case, and congressional and regulatory reviews of prediction markets and multi-leg products continue as filings and oversight activity proceed.