Bank Transfers

If your bank account has a MasterCard or Visa debit card, that'd be fine to use

"The configuration with processor is invalid. Call Merchant Service Provider." That's all I get when trying to use mine.

You sometimes have to call the bank to allow it to work on online stores, or with adult services apparently

Exactly this, just let them know you're trying to make a purchase to an online subscription and they should clear it up no problem.

This. UK friend had problems with this apparently his card had some block on adult content :p They got it removed and now live happy ever after with fakku X3

Thanks for trying guys but problem was different, my bank decided that card's limit for transactions online is 0.00 by default so I just changed it to current balance limit and here I have Hanafuda. So technically error was just correctly preventing me from paying above set limit.

Edit: Holy crap! It seems like paying with card charged me just 40.3PLN, that's exactly book cost after currency exchange with no additional fees (or super minor ones)! 0.o I might just ditch paypal and their shitty fees altogether.

Bank transfer payment method is in the works. Current focus is on improvements to the store itself. After that then I'll be jumping back into the additional subscription payment methods.