A major reason in South Korea is that in the late 90s, the government mandated the use of ActiveX for online banking. This was only recently repealed, and the Korean government is now encouraging people to move on.

The government mandate encouraged many websites to also use ActiveX. South Korea is probably the only country where ActiveX is still in use. Internet Explorer has a browser share of 90-95% in Korea. IE6 is about 15-20% of this.