“The difference is that CBS has been the “home” of The Masters for decades. I’m guessing (yes, guessing) that CBS has exclusive rights on the days that they broadcast, and the other networks cover what Augusta National lets them on the other days.”
So Augusta National made an idiot and restrictive contract with CBS, then??
It's the most exclusive club in the country, founded by Bobby Jones in 1932. They are protective of their reputation and traditions.
-PJ