I bought GalCiv III a while back and thought it was a good game. I also purchased Mercenaries on sale (glad I got it cheap...not a great dlc IMO...needs a lot more mercenaries). I recently bit the bullet and bought Crusade at full price. What a great addition! Fantastic expansion. I'm still finding new things to do.
I am happy to support Stardock. Crusade is money well spent.