I think the odd part is that cards are popular all over the United States. If you look at the show calendar on the Beckett site, they are everywhere and if you've traveled at all, you know people are different all over the place, especially the locals. I've been to Pittsburgh, Baltimore, Boston, New York and Philadelphia multiple times for baseball. After a couple times, you could tell where you are just by talking to the people. Everyone has their own style, yet cards are popular at all places
I'm staying down south at my mother's house for the Winter and I really don't have a lot in common with the people here. They might be just as white as me(probably more since I'm part American-Indian), but we don't have much in common besides that. They do sell cards in the local Target/Walmart and other smaller stores here, plus there is a shop, so cards obviously must sell here.
As a side note. I do notice that the couple people I've met down here that are from NJ, I've instantly bonded with, even if I wouldn't talk to them up there