Most quick-service food chains that move a large volume of coffee, from McDonald's to Dunkin' to Starbucks, primarily offer dark roasted coffees. Why? Because they are cheap.
When beans are roasted to a darker finish, imperfections tend to be concealed and an even flavor profile created,Coffee companies often use unfair labor practices, many of the workers who plant, tend, and harvest the coffee you enjoy are far from enjoying safe or fair working conditions. In Brazil, the world's largest coffee exporter, for example, most coffee workers earn less than 2% of the final retail price of the coffee they produce.