Popeye Cazatesoros

About Popeye Cazatesoros

The pure-play prediction market-operators, Polymarket and Kalshi, emerged from Week 1 as the clear winners. On one hand, Kalshi’s market share lead narrowed over its competitors, falling to 82% for the week ended 13 September, down from 86% a week earlier.

Still, Kalshi had a nine-fold lead over Polymarket, its next closest rival. Polymarket, meanwhile, led the group with 762,000 app downloads, edging Kalshi, DraftKings and FanDuel in the category. The downloads represented a 13,509% weekly increase and 25% of total category downloads, Polymarket wrote in a statement.

Across the market, operators delivered high double-digit gains compared with Labor Day weekend, which featured a full slate of college football games but no NFL contests. Two operators, DraftKings and Underdog each saw triple-digit growth, delivering weekly increases of 125% and 119%, respectively. Three others, Polymarket, Crypto.com and Novig, saw gains of at least 30%, led by Polymarket with a weekly increase of 46%.

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A federal judge sentenced Santos to 87 months in prison last April on felony wire fraud and check fraud charges. After Santos served several months in 2025, US President Donald Trump granted the former congressman clemency, resulting in his immediate release. 

Shortly after his release, Santos had begun working as an influencer for Polymarket. 

Santos’ case represents the most severe among four disciplinary settlements announced by Kalshi, which has faced increasing scrutiny concerning insider knowledge risks and event outcome influence by market participants.

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CEO Levin, who is set to transition to a chair role, commented on the shift, saying that he was very confident that Konstakis has what it takes to be CEO and drive OpenBet to new heights.

He [Konstakis] knows our business, our customers and our technology inside out, and has played a central role in shaping our priorities and how we execute against them. Furthermore, Nikos has been a true confidante and partner in the business since coming on board over eight years ago.

Levin added that he is looking forward to supporting the company and the wider team from his new chair role.