 The 2006 season was the first season in which every regular-season game was televised, as the league implemented an instant replay challenge system.In 2006, the CFL also began offering pay-per-view webcasts of every game on CFL Broadband.Until the end of the 2007 season, CBC and RDS were the exclusive television broadcasters for all playoff games, including the Grey Cup, which regularly draws a Canadian viewing audience in excess of 4 million.