Sweatshops overseas turn out tops by the dozens. As long as they are assembled here, they can be labled as Made in the US. I have a feeling that some I've seen just had the overseas tags ripped off.
You can't buy the thread for a big quilt for what some of the falsies are going for.
I'm glad you made some money. I'm scared to try the craft shows here - you need a tax # and entrance fees are pretty high, even at the flea markets.