With the success of many online-dating platform firms, more and more firms have entered the industry. To attempt to gain a competitive advantage, some online-dating firms have begun to limit the number of matches provided to each customer focusing more on quality than quantity. Some firms even specialize in people with specific religious beliefs, career fields, or education levels. Why do you suppose that people with college degrees who earn high hourly incomes have been among the customers of online-dating firms that provide fewer high-quality matches?