He'll gladly take away your game if you don't give him what he wants.
His ultimate displays magazine covers and posters all about him. This could be seen as a dig at those wanting to skip the cutscenes and getting straight to the gameplay, but this could also be Cartman throwing another tantrum but directing his vengeance at you, the player.
Keep it up and he'll eventually just skip the entire game and send you straight to the end credits sequence instead. If you attempt to skip the opening cutscene, The Coon/Cartman instead interrupts saying you don't want to skip it.