It is widely accepted that universities worldwide are trying to earn some extra money from their teaching. Despite the fact that many universities have operated on a not-for-profit basis, in the past, several of them started to develop educational programs that would profit extra income which they could use for other purposes. One obvious example is the case of the University of Chicago in America. In early 1892, the University created a distance-learning school for people who could not afford to leave their homes and jobs to learn on campus. Other universities decided to do the same thing. In order to attract more students, institutions such as Columbia and the University of Chicago advertised broadly and hired traveling salespersons to gain and retain customers. When students dropped out of the courses after a few lessons, as many did, the university allowed no refund although it incurred no further cost. In this way, universities could earn a profit they could use for other programs