Commercialization of the Olympic Games is getting stronger every day. Economic principles of rationality are being increasingly manifested. Professionalization of sport, which occurred during the 20th century, had a profound impact on the Olympic Games, too. The process is not completed, but analysis of the last third of the last century has shown that the Olympic Games have been organized as the organization of Mega games. Entrepreneurs are at the head, the professionals compete in profit increase in individual revenue items, and all of them seek profit from the games. Olympic Committees are also becoming professional bodies towards the countries. These bodies either contribute by preparing athletes for Olympic competitions, or (in case they took over the organization of the Olympic Games) finance as business organizations. Top sport turned into a competition of professionals who, motivated by high rewards, achieve top results. Competition of those professionals gives pleasure to the millions of viewers and that way top sport turns into entertainment industry. Among cities that are candidates for the organization of the Olympic Games, large cities have the economic advantage. They already have most of the necessary facilities so the arena construction costs are significantly smaller. All difficulties of organization and financing are being emphasized in case of the Olympic Winter Games, which have less sports and athletes and therefore have less spectators and less interest in advertising by large corporations. The most significant individual revenue of the Olympic Games derives from the sale of television rights. Those incomes show steady growth due to the fact that television entered all homes, and people increasingly watch sporting events through the screen. The revenue increase in sponsorship and advertising items is evident, and there is a noticeable tendency of permanent reduction of financing the Olympic Games from public funds. Centuries long evolution of the Olympic Games, conceived as a traditional fortress of amateurism, into complete entrepreneurial product and professionalism, which largely stands out from the amateur idealism of Pierre de Coubertin and strives to the competition of professionals only for bonus payment and personal prestige, thereby throws the former ideals in a completely different plan.