Steamrunners

What is Steamrunners?

At the same time, prediction market operators are facing regulatory tussles in the US. State regulators are moving to shut down the firms under gambling laws. The companies say their contracts should be regulated at the federal level as derivatives. 

However, the sector has grown substantially despite such disputes. Bernstein predicted in April that annual prediction market volume could reach $1 trillion by 2030. The research estimated volume was around $51 billion in 2025 and could grow to around $240 billion in 2026. 

The partnership with Yahoo Finance wraps up as prediction markets push for broader distribution across financial media, sports, and entertainment platforms. For Polymarket, the loss of the Yahoo Finance hub is one distribution channel, but other partnerships remain intact.

What is Steamrunners?

“At one point, I had only a few thousand euros left to gamble with, but then I won €180,000 in a single day. The next day I lost it all again,” he says.

“The day after that I won €150,000 – and lost that too.” That was the point at which he decided something had to change. “I thought to myself: This has gone too far.”

Madsen eventually sought help. His parents supported him and, at one point, took control of his finances. “It was embarrassing, but it was necessary,” he says.

What is Steamrunners?

GREF is a cooperative network bringing together national gambling regulators across Europe and beyond to facilitate dialogue, exchange information and share best practice on regulatory strategies. 

Tim Miller, who resigned from the UK Gambling Commission earlier this year, has stepped down from the GREF board and has relinquished his role as treasurer. 

Miller served on the forum for several years and was a key UK figure during a period when the Gambling Commission implemented extensive reforms to online gambling regulation and affordability checks. GREF expressed its gratitude for Miller’s contributions during his tenure.