The South Korean regulator has taken a decisive step against decentralized prediction platforms. On August 18, the Communications Standards Commission (KCSC) officially approved blocking access to Polymarket, classifying the service as an illegal gambling site. The decision was made after a thorough analysis of the platform's operating model, which, according to the authorities, undermines local gambling legislation.
The regulator's claims cover a wide range of markets, including political events, payment systems, sports matches, elections, and even weather conditions. The KCSC's key argument is the "winner takes all" model, which, in their assessment, provokes users into gambling behavior. The financial outcome of such bets directly depends on external events that participants cannot control, making them closer to roulette than to investments.
The Commission paid particular attention to the role of Polymarket's administration. As emphasized in the decision, the platform operator does not merely provide technical infrastructure but also actively manages the creation of markets, sets trading rules, ensures the deposit and withdrawal of digital assets, and charges fees on each transaction. This, in the regulator's view, turns the platform into a full-fledged gambling organizer.
In response to the accusations, Polymarket representatives insist on their non-custodial nature. They claim that the service operates as a P2P platform based on smart contracts, not storing user funds directly. However, the KCSC rejected these arguments, stating that technical features—including decentralized elements and a user-friendly trading interface—do not remove the platform from the jurisdiction of South Korean laws. The blocking, according to the regulator, is necessary to protect local users from potential financial risks.
Notably, this is not the first attack on prediction markets. Earlier in August, New York authorities launched an investigation into the marketing practices of Polymarket, Kalshi, and related products from Coinbase and Gemini Titan. The trend is obvious: global regulators are increasingly viewing decentralized platforms as gray areas requiring strict control, despite their technological innovation.
My analysis: The KCSC's decision is a signal for the entire industry. Even fully decentralized protocols cannot ignore national jurisdictions, especially in Asia, where regulation is rapidly tightening. Polymarket will likely have to either restrict access for South Korean IP addresses or implement KYC mechanisms, which contradicts the very philosophy of DeFi. In the long term, this could lead to fragmentation of the prediction market and the growth of shadow alternatives, which is hardly the regulators' goal.