1996 Summer Olympics an attraction known as Coca-Cola Olympic City. The Games were affected by several instances of ambush marketing—in which companies attempt to use the Games as a means to promote their brand, in competition with the exclusive, category-based sponsorship rights issued by the Atlanta organizing committee and the IOC (which grants the rights to use Olympics-related terms and emblems in marketing). The Atlanta organizing committee threatened legal actions against advertisers whose marketing implied an official association with the Games. Several non-sponsors set up marketing activities in areas near venues, such as Samsung (which competed with Motorola), which ambushed the Games with
Summer Olympic Games demand for tickets to all levels of each event, there was controversy when seats set aside for sponsors and National Delegations went unused in the early days. A system of reallocation was put in place so the empty seats were filled throughout the Games. Rio de Janeiro, Brazil hosted the 2016 Summer Olympics, becoming the third city in the Southern Hemisphere to host the Olympic Games after Melbourne, Australia, in 1956 and Sydney, Australia, in 2000, and the first South American city to host the Olympics. The preparation for these Games was overshadowed by controversies, including the instability of Brazil's