Many governments pay cash rewards to athletes who win olympic medals because

Many governments pay cash rewards to athletes who win Olympic medals because wins by athletes bring prestige and other benefits to the whole country.
Not only that, cash rewards could also increase the athletes' motivations during training and on-field performance and will increase their chances of winning.

It could be anything, recent improvements in technology/telecommunication/internet have increased the pace of globalization.generally, it has something to do with technology. globalization means that people around the world are brought together through technology which speeds things up. so maybe some of those options could be correct. : )