Mr Thimble

How to play Mr Thimble

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.

About Mr Thimble

Coming from the outside, I needed to gather a team to help steer the ship. In the two years since I took on the role, I have been blessed to work with some of the sharpest minds in the industry and I couldn’t be prouder of what we have achieved so far.

I won’t lie, when I first entered iGaming, I had my concerns. Aspects of the industry felt stuck in a state of stasis. People were making money, and as long as that continued to happen and margins were healthy, why innovate? Just keep doing the same things over and over, with marginal improvements when necessary.

As someone with a naturally curious mind, I found this frustrating. However, in a short period of time, I have seen positive changes. Recent regulatory shifts and an increasingly competitive landscape are pushing companies to innovate, and those unwilling to adapt are being left behind.

What is Mr Thimble?

Its findings contained an all-too-familiar combination of ineffective systems, delayed interventions and inadequate source-of-funds controls. One customer placed approximately 4,800 bets in one day and 7,000 the next without being flagged. Another, whose payslips showed monthly earnings of about £2,000, deposited and lost £9,000 in four days.

“What is striking here is the level of activity that apparently failed to trigger effective intervention,” Williams says. “These were obvious indicators requiring further scrutiny, and it is difficult to understand why they did not result in more effective intervention.”

He adds that the recurring weakness is often not an absence of policies but a failure to ensure “technology, algorithms and operational processes actually work in practice”. Some of the QuinnBet issues followed a platform migration, underlining the need to retest controls whenever systems change.