If the grocery store down the street stopped selling the products that I wanted to buy, I would simply stop going to that grocery store. If enough people stopped going to that grocery store, it would go out of business. There's a natural competition, there's a natural butting of heads that demands that if the owner of the store wants to continue gathering their particular chosen form of value, which is money, in this case, they have to provide the value that the consumer would like to receive