What's wrong with bank transfers? The extra bank charge that you have to pay or something else? Just asking.
An international bank transfer from the US is typically $40 or so, my bank charges $40. It is also a long long difficult process with a lot of paperwork and standing in line at the bank.
I used to do it often when buying bulk items for resell when I was running Anachronism, but for an end user who just wants to pay a shareware fee? Kind of makes it difficult to justify I'm sure.