There is no rule of three that says that private broadcasters would benefit if the CBC/Radio-Canada ended its reliance on advertising. France Télévisions' recent experience illustrates this perfectly. The advertising that France Télévisions no longer sold did not automatically translate into more advertising for private broadcasters. That wasn't the case. Everyone in France was taken by surprise. So then, we need to be careful when making these kind of calculations because the broadcast world is constantly evolving and no one really knows what changes of this magnitude might bring about. France Télévisions officials went against the grain on this issue.
On February 14th, 2011. See this statement in context.