Wild Portals

About Wild Portals

When Spain captain Rodri lifted the Fifa World Cup trophy at MetLife Stadium in New Jersey in July, a nation celebrated its team’s return to the summit of world football. Across five weeks and eight matches, Spain had proved itself the best team on the planet, overcoming its strongest rivals to claim the trophy for a second time.

As Spain celebrated the successful end of their campaign, Kambi was reflecting on a significant achievement of its own. For the sports betting technology provider, the tournament represented a major technological milestone: its first World Cup traded entirely by AI.

Across 104 matches and more than 100 million bets, AI handled every stage of the pricing lifecycle – from ingesting data and creating the offering to managing liabilities and settling bets. The platform recorded zero downtime, delivered an operator trading margin of 18% and, during the final alone, processed more than one million unique bet combinations.

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A hearing before the Supreme Court would be the culmination of what has been the biggest sports betting-related development since PASPA. Perhaps no other issue has united gaming stakeholders from various companies, tribes, states and regulators.

Beginning with the US presidential elections in November 2024, when prediction markets catapulted into mainstream culture, their rise has been undeniable. Kalshi and Polymarket have seen their valuations balloon to $40 billion and $21 billion, respectively, and the majority of the top US bookmakers have scrambled to expand into the prediction space in various forms, either by building their own exchanges, acquiring existing ones or engaging in market-making.

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.

About Wild Portals

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.