Cornelius

About Cornelius

And now sportsbooks are joining the prediction market race themselves. DraftKings has moved into the market, while Flutter is also developing its presence. That could make prediction markets an additional source of revenue rather than a straightforward threat.

But it also requires investment at exactly the time shareholders are demanding better returns. Flutter’s recent results illustrate the tension. US adjusted EBITDA fell sharply in the first half of 2026, while the company continues to invest in FanDuel Predicts and other initiatives aimed at future growth.

But in the UK Entain’s share price weakness is less about prediction markets and more about tax, debt and confidence.

What is Cornelius?

The first was direct marketing (emails, texts, push notifications). Citing randomised studies, the committee noted that limiting direct marketing resulted in reduced betting and fewer short-term harms. 

Referencing an Australian study on direct marketing and its link to gambling harms, Dr Philip Newall, senior lecturer at the University of Bristol noted that “causality was established by getting a random subset of participants to opt-out of receiving direct marketing offers”.

It was found that “this group then self-reported significantly lower expenditure and harms [ … ] over the next two weeks”.  

How to play Cornelius

His analogy is a poker table at which the weaker participants sustain the game. If those players disappear, the fourth-best professional at the table can suddenly become a loser because only the three strongest remain.

The US addressable market is vastly larger and customer recruitment remains strong. Marantelli says Kalshi increased its number of clients fivefold during the World Cup, while White Swan predicts that NFL prediction markets could generate between $5 billion and $7 billion of liability in a single week.

But he acknowledges the possibility that faster customer losses could eventually test the sustainability of the model.