Baltimore just dragged Kalshi and Polymarket into Circuit Court and called them what they are: sportsbooks wearing a federal Halloween costume. Mayor Brandon M. Scott did not file a polite memo. He filed two lawsuits on August 13 and put a city stamp on a fight the entire betting industry has been dancing around for months.
I have watched legal sports wagering get built state by state, tax by tax, responsible-gaming rule by responsible-gaming rule. Now two platforms are running point spreads, player props, parlays, and in-game action for anyone 18 and up, calling it “event contracts,” and daring local governments to stop them. Scott put it clean: “These companies are running sportsbooks without licenses and betting that a new label will put them above the law. It won’t.”
He is right. And if you care about the integrity of a bet, you should be paying attention.
A Thesaurus Is Not a License
City Solicitor Ebony M. Thompson did not hedge. “Kalshi and Polymarket cannot circumvent Baltimore’s consumer protections by repackaging gambling as something else or claiming federal regulation puts them beyond the reach of our laws.” That is the whole case in one sentence. Maryland requires a license from the Lottery & Gaming Control Agency. These outfits do not have one. Maryland sports wagering starts at 21. These platforms start at 18. The city wants an injunction, restitution, disgorgement, and civil penalties up to $1,000 per violation per day.
Kalshi’s response was pure theater of its own. It called the suit “political theater by Mayor Scott” and an attempt to relitigate a Fourth Circuit appeal. Polymarket waved the CFTC flag and warned against a “patchwork” of local rules. I have heard that song before. When the product looks like a bet, settles like a bet, and advertises like a bet, the label on the jar does not change what is inside.
Adam Levitt, working the city’s side, said allowing this would “set a dangerous precedent far beyond Baltimore.” He is not wrong. If “prediction market” becomes a magic word that voids state gambling law, every regulated book in America just got told the house edge is optional and the compliance department is a sucker’s tax.
The Numbers Are Not Subtle
I am going to put the receipts on the table, because the industry keeps pretending this is some elegant price-discovery tool.
Ordinary retail users on Kalshi lost $583.5 million from launch through May 2026. More than two-thirds of that, $371.6 million, came from sports. The company itself has admitted nearly three times as many people lose money as make it. On Polymarket, one study had more than 70 percent of trading gains flowing to the top 0.04 percent of users, with 70 percent of traders losing money. Combined monthly global volume on the two platforms jumped from under $5 billion in September 2025 to about $24 billion by April 2026. Americans average roughly $14 billion a month on legal sportsbooks. During the World Cup, prediction markets chewed through around 27 percent of all legal U.S. sports-betting volume.
That is not a side market. That is a raid.
And the customer base is younger by design. Twenty-two percent of Americans, and almost half of men ages 18 to 49, already hold at least one active online sports-betting account. Hand an 18-year-old a phone, a parlays board dressed up as a futures contract, and nonstop media noise about easy money, and you do not get “information markets.” You get bank accounts on fire and a city left cleaning up the damage without the tax revenue or the responsible-gambling guardrails the licensed operators actually fund.
DraftKings and FanDuel felt this in their numbers. Soft sportsbook revenue pushed them toward the same prediction-market playbook, chasing states that never legalized and ages that regulated books cannot touch. That is not innovation. That is regulatory arbitrage with a marketing budget.
Baltimore Drew the Line. The Industry Should Thank It.
I am not anti-betting. I make my living reading lines and telling you where the edge lives. What I am against is a two-tier system where one side pays for licenses, age gates, taxes, and addiction resources while the other side rebrands the identical product, drops the floor to 18, and hides behind a federal agency that was never built to babysit Sunday ticket parlays.
Let me tell you something about Mayor Scott. He is not some scold trying to ban fun. He is a mayor looking at multibillion-dollar platforms extracting money from his residents with none of the oversight Maryland already wrote into law. “Baltimore will not let multibillion-dollar companies put profits over people and harm our communities through illegal gambling.” That is a legacy sentence. Either the courts back it, or every city in America gets the message that consumer protection is optional if your lobbyists can say “CFTC” with a straight face.
This lands at the Supreme Court eventually. Everyone in the building knows it. Until then, the volume keeps climbing, the ads keep running, and the youngest bettors keep learning the hard way that a siren song does not care what you call the app.
I said it when the state first went after Kalshi, and I will say it louder now: if it prices a spread, sells a prop, and takes your money when the final horn sounds, it is a sportsbook. Baltimore just refused to pretend otherwise. The rest of the country can keep pretending the thesaurus is a regulator. I will not.
