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Commercial sports betting generated just under $17 billion in nationwide revenue in 2025, which is why Davenport asserts that the “stakes of this case are exceptionally high”. Kalshi and Polymarket alone posted more than $45 billion in trading volume, which is similar but not identical to betting revenue, in August. That was a 15% decline from July, although that drop is attributed to the conclusion of the Fifa World Cup tournament that month per Yahoo! Finance.
The American Gaming Association estimates that the exchanges have siphoned more than $1.3 billion in would-be tax revenue from states. One of the AGA’s primary spokespeople pin its fight against prediction markets is former New Jersey governor Chris Christie, who championed the PASPA case to the Supreme Court.
As with PASPA, this matter revolves heavily around federalism versus states’ rights. Traditional sports betting is governed by individual state regulators with varying laws and regulations. Federal derivatives are regulated by the CFTC, which has fully embraced prediction markets under US President Donald Trump after rejecting them in previous administrations.
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Independent analysis by Bettormetrics found Kambi partners either led or shared the lead on measures including time to market, live uptime and bet delay. It also outperformed its B2C and B2B competitors on live uptime in World Cup markets including over/unders on total goals.
“All the testing in the world cannot tell you precisely where you stand against the rest of the market on key aspects of the product,” Lamb says. “It was very positive to see Kambi as a leader in these key metrics.”
The way customers used the offering was equally instructive. Bets outside the match-winner market accounted for 63% of pre-match turnover, compared with 57% in 2022, reinforcing the importance of depth beyond traditional markets.
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For all the hoopla surrounding prediction markets and expectations that the industry will eat away at sportsbooks’ NFL handle this season, the old guard industry is expected to control nearly 80% of pro football wagers this year.
Eilers & Krejcik Gaming (EKG) estimates that bettors will plunk down $40.5 billion on the NFL this season through regulated channels. Traditional sportsbooks are projected to capture $31.7 billion of that total, compared to a handle analog of $8.4 billion for prediction markets—a 79% to 21% split in favor of legacy operators.
Handle analog is a metric used as a cleaner comparison between sportsbooks and prediction markets because the latter’s volume doesn’t compare evenly with sportsbook handle.
