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Two operators alone – Kalshi and Polymarket – topped the combined $1 billion mark in NFL trading activity over the first six days of Week 1, according to numerous measures this week. During the period, Kalshi recorded NFL volume of $983.4 million, according to DeFi Rate, earning the pole position by a large margin. Mahomes and the Kansas City Chiefs thrashed the Denver Broncos 31-10 on Monday Night Football, capping the largest week for prediction markets ever.
Even before the primetime matchup in Kansas City, it became abundantly clear that the industry would shatter previous marks for weekly activity. The AFC West showdown bolstered the already robust totals. Overall, volume for the week hit a record $15.9 billion, according to Bank of America, up 16% from a week earlier.
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.
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“Casinos, junkets, cryptocurrencies and underground banking are the most critical parts of the money laundering infrastructure that fuels international organised crime,” he said at the time. “The global gambling market will reach $205 billion in 2030.”
The government blocked 548,420 illegal betting and gambling websites between 2006 and 2025, including 84,000 in 2025 alone.
These comments echo a similar sentiment emphasised at the country’s Directorate of Communications panel event on illegal betting and addiction on 10 September. Deputy Minister of Interior Ali Çelik suggested that curbing addiction would lead to a decrease in illegal betting activity.
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A memorandum of understanding, signed on Monday, aims to tackle rising gambling exposure among schoolchildren through smartphones. The aim is to integrate preventative education with broader school-based initiatives.
The agreement was signed at Osan Seongho Middle School and links gambling prevention education with a “phone free” strategy alongside RAS education. RAS is an approach combining reading, arts and sports and is designed to occupy students’ time with structured, screen-free activities.
The dual approach seeks not only to limit access to gambling content on smartphones but also to provide meaningful alternatives that reduce overall reliance on digital devices.
