If you paid full price for the original game (which was not very good) then Crusade is $19.95.
But if you never bought the original game then it AND Crusade are $19.95.
This is no way to treat your customers. That sound you're hearing? It's the camel's back breaking. I think I'm done with Stardock. It's not like there aren't a dozen other space 4X's to play.