According to Normon Solomon's P.U.-litzer Prizes, CNN's Jack Cafferty said the following:

This is a commercial enterprise. This is not PBS. We're not here as a public service. We're here to make money. We sell advertising, and we do it on the premise that people are going to watch. If you don't cover the miners because you want to do a story about a debt crisis in Brazil at the time everybody else is covering the miners, then Citibank calls up and says, 'You know what? We're not renewing the commercial contract.' I mean it's a business.

Well, that clears that up.