The celebrities who played themselves weren't the focus of the show, usually there for literally one joke, then or in any of those earlier episodes. Baldwin/Basinger were co-stars of their episode. There was also a very Austin Powers Goldmember (has to be a better analogy) type usage where the existence of the celebrity themselves was apparently supposed to be funny. The tennis episode might have been my breaking point. Oh look it's the Williams sisters, isn't that crazy!