Of course this insidious inside politics powerplay scenario could be true, or it could be simply that they didn't want to cannibalize themselves by spending two hours talking about sports media opposite their sports station. I know that they talk sports (at least peripherally) on WRKO sometimes, but that is usually when you can't get out of the way of it (Opening Day, World Series, etc.), but this doesn't seem as important (though the throwaway nature of a holiday weekend almost makes me think "who cares?").
Scott has had unkind things to say about WEEI and Entercom that were editorial more than factual, so maybe they didn't want to enhance his brand in any way. That is their prerogative too. With competing stations and the web, they don't really have the power to silence their opposition (unless the opposition gives them that power with a signed contract, but I digress), but they don't have to hand him a 50,000 watt megaphone either.