Blockchain-based online game firms are doing business outside Korea as the Korean government does not authorize business. The ban is to prevent gamers from issuing cryptocurrency coins.
Globally, Korea is one of the big powerhouses for online gaming. But the government sees the online game as gambling. Any online gamers should get approval from the government to launch games.
The blockchain-based online gaming companies do not seek approval from the government as they know the government would reject the application. Instead, they start a business outside of Korea.
They hope that someday, they will get approval from the government.
Ultimately, online games would run under the blockchain platform where players buy and sell cryptocurrencies.