Because Thai RO is the champion of RWC for many years! Ok not really, this is irrelevant lol
RO has always been Thailand's #1 online game. We do love RO. Personal experiences, when I was a kid, I failed almost all midterms because I was too addicted to RO. That's why I was forced to quit. It's until I was in a university that I had a chance to play RO again and I joined iRO.
I just got home and I'm about to make a new char in Iris. The server just opened yesterday. Everyone started equally and zeny is absolutely not inflated *cough* iRO's economy xD Stay tuned. I might upload a quick first glance of Iris on my youtube channel tonight or tomorrow if I have time ^_^v