Shaolin Master

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The report utilised various methods to estimate the size and scale of Europe’s black market, including web traffic, digital marketing, macros data and regulations in place across the 28 markets surveyed.

Helios, a specialist consultant in gambling web traffic, analysed the number of black market websites actively marketing across the 28 markets included in the report, between March and May.

This data was cross referenced with SimilarWeb traffic analysis to confirm the scale of activity. In some markets, the number of illegal sites being actively marketed was much higher than those that have local licences to operate.

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Kelley also cited improvements at Robinhood as a possible factor for the regression at Kalshi. Just before the NFL season, Robinhood took a minority stake in Crypto.com and struck a deal to begin routing NFL contracts to OG.com, the site’s regulated prediction market platform.

A 40% weekly increase at Crypto.com combined with the attrition at Kalshi may reflect the enormity of the Robinhood deal, according to Kelley.

With all activity, beyond just football, Crypto.com recorded trading volume of $350 million for the week, figures from The PM Pulse show. The newsletter, which is in partnership with Aldrin Research for monitoring industry trends, indicated that Crypto saw weekly growth of 41%. While Kalshi and Polymarket accounted for more than $15 billion in weekly volume, four others recorded activity of at least $300 million. Buoyed by a popular Sydney Sweeney ad, Novig increased volume by nearly 34% on the week.

What is Shaolin Master?

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).

Other retail sectors performed better. Bingo GGY increased 8.2% to £703.8 million ($941.8 million), while arcade GGY rose 10.7% to £800.1 million ($1.07 billion).

While the new figures underline the sheer scale of Britain’s regulated market, leading operator Entain is pressing the government for tougher action against black-market platforms.