South Korea has officially cut off access to Polymarket for its citizens. The country’s Broadcasting, Media and Communications Review Committee held a vote on August 18, 2026, to block the crypto prediction platform for violating South Korea’s Criminal Act regarding gambling facilitation and the opening of gambling places, as well as the National Sports Promotion Act on illegal betting.
However, what makes this move interesting is not just the ban itself, but the evidence used by regulators to target them.
Seoul Weather Trail
Out of thousands of prediction markets, authorities highlighted one specific contract: predictions on the rainfall levels in Seoul throughout the month of August. The existence of this local weather market was used as strong evidence that the platform is still actively targeting and serving users in Korea. The committee also listed four key elements that place Polymarket under the definition of illegal gambling: a winner-takes-all settlement structure, market creation and rules unilaterally determined by the platform, the crypto deposit and withdrawal system, and the practice of charging transaction fees.
Polymarket did not stand idly by. They defended themselves by arguing that the platform operates peer-to-peer without intermediaries and is non-custodial via smart contract. Management stressed that they have never held user funds or issued sports betting tickets. As additional proof of compliance, they claimed to have discontinued Korean-language services and rejected transactions using won.
Failing to Hide Behind the Code
All of these technical arguments were rejected by the commission. Regulators emphasized that network decentralization, interface design, and the order book system cannot be used to escape the reach of national law. This voting decision actually only formalizes the authorities’ tough stance, given that the South Korean police had already initiated criminal investigations against the platform’s users in May 2026 over gambling allegations in election prediction markets.
This series of bans narrows Polymarket’s operational space in the global market. India had previously blocked the platform in May, followed by a wave of opposition from France, Australia, Germany, and the Czech Republic in July. On the banking front, JPMorgan has also taken steps to sever business ties with the platform.
For other Web3 projects, this series of blocks sends a crucial warning: a neat decentralized architecture on the blockchain is no longer immune when regulators begin examining its real-world impact on the ground.
Reported by crypto.news.
Disclaimer: This article is for informational and educational purposes only, not financial advice. Cryptocurrency assets are highly volatile and carry significant risk. Always do your own research (DYOR) and never invest more than you can afford to lose.
