That's the problem. Stardock requires instant payment via paypal, in other words, a credit card is required. And that's my problem: I don't have any credit card, but my paypal account has enough money stored to buy Entrenchement. So, why is a credit card still required? I thought I would now be able to download Entrenchement, but it seems I'll be stuck with single Sins forever...

That is only a workaround to my problem, but thanks for the info. I wonder, if I had prepaid my paypal account witt $ instead of €, would I have then been able to buy Entrenchement withount credit card? Or is that a problem in general?