I think it's trying to depict the most popular brand that originated in that state. I.e. out of all the brands that started in Pennsylvania, Hershey's Chocolat

I think it's trying to depict the most popular brand that originated in that state. I.e. out of all the brands that started in Pennsylvania, Hershey's Chocolate is the most popular worldwide. It's not saying that people in Pennsylvania are crazier about Hershey's than about any other brand.