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What is Diamonds Are Forever?
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%.
What is Diamonds Are Forever?
Lula said he intends to discuss the matter with his team and analyse potential measures to consider the social impact of online betting.
What the president does not acknowledge is that the government relies on revenue from the sector. In just the first seven months of 2026, BRL8.747 billion generated by sports betting has already flowed into public coffers. The Federal Revenue Service estimates the total could reach BRL16 billion by the end of the year. In 2025, nearly BRL9 billion was collected from sportsbooks.
The burning question is where such funds will come from if Lula shuts down the betting industry. Yet, no one points out to him that players will simply migrate to the illegal market. Betting will continue to exist, but without formal tax revenue, oversight or player protections.
About Diamonds Are Forever
That widening breadth is vital for the industry at a time when some analysts estimate volume could jump to $10 trillion by 2035 – a projection that is largely rooted in other categories surpassing sports for the top spot.
Nearly a third of respondents told Fullstory that increased event contract breadth could compel them to consistently choose a prediction market over a sportsbook.
Sportsbook operators have an inherent advantage over prediction markets in that the former can offer significantly larger sign-up and retention bonuses and gaming companies are leaning into those expenditures this football season.
