Drifter995 wrote...
I'd double check if it has your billing address attached to it, and double check it's approved for adult content. Apparently they sometimes need to be approved for adult content to work with this site as well
Nevermind guys, I got my bank statements from the automat yesterday and noticed the date of the money transfer from my bank account to my prepaid card account says 01/25/16, even though in my online banking the date says 01/23/16. In other words, I was tricked into thinking I already had money on my prepaid card, WHICH I DIDN'T. No wonder the transaction was declined. I just retried buying a book and it worked perfectly fine.
For anyone coming from Germany who is customer at Volksbank: You can use their prepaid credit cards (the now so-called BasicCards) for payments at Fakku. I guess other banks will have similar offers, which should work as well. Also, if one from the team could maybe take this into a list of accepted cards, that would be sweet.