What you have described is an oligopoly. Think airlines, or gasoline, or soda. All airline tickets from point A to point B in coach are basically interchangeabl

What you have described is an oligopoly. Think airlines, or gasoline, or soda. All airline tickets from point A to point B in coach are basically interchangeable, so if one airline has a fare sale, everyone else has to follow or risk flying empty planes. Same, if one gas station on the corner is $.05 cheaper than the other one, they’ll get all the business. Airlines and gas stations are most, most definitely not monopolies.