Complex sentence: CBC became concerned that the private stations might succeed in pressuring the government to permit such a private radio network and so the CBC set up its own second network to appease demands by privately owned CBC affiliates for popular programming that would provide more commercial revenue.
Split into simpler sentences: CBC became concerned that the private stations might succeed in pressuring the government to permit such a private radio network. As a result, the CBC set up its own second network to appease demands by privately owned CBC affiliates for popular programming that would provide more commercial revenue.