Well my roommate has an account which he has used a few times - not sure if he goes on PC server though. I also have another friend who has been online - again not sure if he went on PC server. His account name was 3D I believe. Do not know roommate's account ID.
I know quite a few people who just play YGO online. You ever heard of a program called Yugioh Virtual Desktop (YVD)? It is the best program in my opinion to duel people over the internet. Think of it as the Yugioh version of Pokemon Online. I'll provide the link below.