It could just be I'm running into the mistake more than others. I have a huge cast, and I've frequently had to correct some of them about it in the last couple of years (new and old alike). I've seen it in app samples and early posts of new players too.

THAT all said, I actually forgot to come back and edit this comment. On plurk we got to discussing this and other things, and Showan made a good point I had to agree with that games with currency just tend to make things complicated. So in hindsight, I agree with you that money wouldn't be the best way to go anymore. At most, people forgetting it doesn't exist is a nitpick I have I wish could be ironed out rather than a serious problem. Maybe it just needs to be broadcasted better?