By 1933, Saturday night games are broadcast from coast to coast on twenty stations. Throughout the 1940s and 1950s, hockey is the most popular radio program in Canada. 1925 Broadcasts of hockey games are sponsored, for the first time, by General Motors. This keeps them on the air for many years. Despite the profits realized by private stations airing NHL hockey games, most radio stations operate with very little revenue.
Broadcasters often work for nothing more than credit and the hope of promotion.
CNR broadcasts its first major network show on July 1, which was much appreciated by listeners both on trains and at home. Worried about the lack of public interest in Canadian radio, the government assigns Sir John Aird as head of a Royal Commission on Broadcasting in Canada . After an in-depth study, the Commission recommends that a national broadcasting network be established and funded by the federal government. The Commission also asks the government to establish legislation against advertising on the air. After a series of delays and a parliamentary election, the government finally acts on the recommendations of the Aird Commission.