Well that's unexpected. Korea just broke into the Top 15 countries that use IFTTT, the online service that connections various other online and offline services together ("If This, Then That"). This list was specifically for IoT usage.
That's pretty interesting since, as far as I can tell, the IFTTT interface is only in English. So 18% of Koreans who use IFTTT use it with an IoT device... I wonder what device they're using most? I've been keeping my eye out for the Philips Hue, but haven't seen it in any major stores here yet. I wonder if they're ordering devices from overseas and just shipping them here. The home camera systems might be popular, but that's just a guess.
One reason might be that the home IoT setups promoted by the local telecom companies include monthly fees. Why pay $9/month for a home Wi-Fi camera service, when you could just buy the camera for $20 and hook it up yourself? With IFTTT you could utilize it remotely in a variety of ways without any monthly fees.