No man, you don't get it, and I think it's because you're not North American. Depending on the part of NA you live in and how influenced it is by native heritage, you'll find all these native art oriented shops, and beaded-cloth, earrings are always prominent. They've been adapted to white culture of course, and you'll find them everywhere now, but the feeling is you think of them as being native Indian.
There's no real traditional, cultural thing attached. It's complicated, and it's simple. Basically with native North Americans you have all these many varied bands, and they borrow from each other's cultures which creates this kind of mish mash of cultural references from all the different tribes you'll find in all North American shops with a native art slant. Beaded-cloth earrings you'll find in shops centered on the North Coastal Haida art, or South Western Navajo, and all points in between.