This might be of interest to anyone who can't use their normal credit / debit card to pay for ebooks because of geographic restrictions.
A post in another thread (
https://www.mobileread.com/forums/showthread.php?t=88232) mentions a service called Entropay. As far as can see, Entropay is a virtual debit card. The key point is that it will authorise your purchase even if the address you give to the merchant doesn't match the address registered for the card.
Has anyone got any experience using Entropay? At first glance, it looks like it might be a useful service, but I see there's been a bit of negative feedback in various forums, especially in regard to customer support.