They're a very tech savvy country
(Warning, personal pet-peeve tweaked: rant incoming)
They're really not. They have lots of nice things like nation-wide gigabit and 4G almost everywhere, but most Koreans know absolutely nothing about how almost everything works in the digital world.
IE6/7 is still king here and ActiveX controls are on virtually any site that you have to login to access (read: all of them). Ask a Korean to go to Google, and they'll open IE (homepage'd to naver.com) and type "google" into the search box, and then click their way to the desired result- the concept of navigating the internet outside of the Naver/Daum portals doesn't exist here. There are lots of examples of how Korea is full of technology, but putting it to use has been hampered by absurd laws passed by (really fucking old) hysterical ultra-conservatives in the government hell-bent on protecting the national brands.
If you think banning the RMAH has anything to do with youth-health, you haven't been paying attention: youth are already kicked offline from all games and gaming services in Korea from 12am to 6am (Xbox Live and PSN included for those freak Koreans who have a 360/PS3).
This move has nothing to do with protecting youth and has everything to do with protecting the profits of all the Korean-brand games that operate on a pure one-direction freemium model: you farm or you buy, but either way you're paying the company.