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About Double Stacks
“The largest black market operators have scaled to create recognisable brands with traffic that can compare to domestically licensed operators,” the report’s authors wrote. “The top group of sites by common owner has a 12% share of traffic, while the largest single brand has 10%.”
Beyond offering crypto payment solutions, a number of black market operators are licensed in “light touch” offshore jurisidictions which use opaque offshore operating structures to help to obscure company ownership and make local enforcement against these companies complex, the report noted.
By comparison, the long tail of smaller black market sites rely heavily on affiliates to generate traffic.
What is Double Stacks?
In a written response published in January 2026, Arno Rutte, the state secretary at the time acknowledged that enforcement against such sites remained limited, particularly for domains not registered under the .nl extension.
According to KVA, KT van Bruggen, the current state secretary for Justice and Security, has pointed out the urgency of implementing effective countermeasures to limit access to such illegal platforms.
Last week a committee made up of MPs from across the Netherlands’ political spectrum also raised concerns around the role of Meta and Google in supporting the black market.
How to play Double Stacks
“We’re calling on the Supreme Court to resolve this issue and recognise that Congress did not silently make the sports-betting industry immune from state law,” Davenport said in a statement.
New Jersey stakeholders are no stranger to the importance of a Supreme Court review. The state lost every case in the lead-up to the PASPA repeal, except for the one that mattered most in the end, and it could be the same in this matter as Kalshi has prevailed thus far in state court and the Third Circuit. Davenport’s petition cites that fateful PASPA ruling in its introduction.
“Just eight years ago, this court reiterated that ‘each state is free to act on its own’ in regulating sports betting,” the petition says. “But Kalshi has a different view. Kalshi bills itself as ‘the first app for legal sports betting in all 50 states’ and believes it can offer that legal sports betting without following the sports-gambling laws of any of those 50 states.”
