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What is 28 Mansions?
For now, the growth provides room for multiple market makers. Marantelli expects margins to “stay good during the growth period” before contracting as competition intensifies. The more complex RFQ and parlay markets may offer the best protection against that compression.
The result is an emerging ecosystem that looks less like millions of customers casually trading predictions with one another and more like an outsourced sportsbook trading room. Exchanges own the platform and recruit the customers; specialist firms price the risk and provide the money needed to make those markets function.
As Marantelli says: “Let’s call a spade a spade.”
About 28 Mansions
Despite the increase in remote GGY, new account registrations fell 3% to 32.4 million. There were 25.7 million active accounts at the end of the final reporting quarter.
Funds held in customer accounts also declined sharply. Operators held £886.6 million ($1.19 billion), down 13.9% from the same point a year earlier.
Retail betting diverged significantly from the wider market, with non-remote betting GGY falling 3.3% to £2.4 billion ($3.2 billion). The number of betting shops dropped for a 12th consecutive reporting period to 5,617 premises—a 3.6% annual decline (down 208 shops from March 2025).
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The federal government says a California tribe opened a short-lived casino despite repeated warnings that its legal authority to operate was under review.
On Friday, a Department of Justice attorney told a federal judge that the Scotts Valley Band of Pomo Indians knew the Interior Department could reverse an earlier determination that its Vallejo land was eligible for gaming.
Despite those warnings, the tribe opened its “Preview Casino” on July 24, offering Class II gaming out of modular structures.