Some super markets carry your favorite brand of frozen chicken nuggets, others do not. Makes me think there are agreements between producers and retailers and t

Some super markets carry your favorite brand of frozen chicken nuggets, others do not. Makes me think there are agreements between producers and retailers and that those agreements are all about money. I bet there are clauses in those agreements that state that the retailer should "make my brand of ketchup the first brand that customers see" and that they cater to that clause "for a small fee".