Cultural imperialism doesn't exsist. It's a myth. It's something for people in other countries to blame when they see their children growing up listening to Rock and Roll and wearing Levi's. American parents have similer complaints. Insteaed of blaming other countries we blame Hollywood. I don't know what parents in Hollywood complain about.
American business doesn't go into other countries to spread our culture. They go there because they see an opportuity to make money selling things to people in those countries that want to buy them. If your complaint is that you don't like people in your country buying American products, then don't buy American products. But the real problem is that people in your contry want to buy American products, not "cultural imperialism".