Fact: YGO the manga came out before the card game, it's not simply a tool to advertise the card game. That can be said about GX and possily 5D's, not the series writen by Kazuki Takahashi.
Fact: You're ignorant if you judge YGO on the dub. The dub is horrible, the Japanese version on the other side is quite good.
Fact: YGO threads are okay, 5 threads are not.