Honestly, the best payment option for a Standing Order will depend on the affiliate. Personally, I keep a PayPal account directly tied to my bank; that's probably the easiest and most convenient because there are the fewest transaction charges attached to such a thing. I don't know if that's possible internationally, though. In that case, it may be better to use TCurrency, but again, there's still some question about how to go about purchasing that efficiently.
