I live in India.
I like a product from amazon.co.uk, and it ships to my area.
I have enough money in my amazon pay balance to buy that product.
However, the only way to pay for it is by using international debit/credit card.
Amazon does offer me a choice to pay using Indian currency while using the international debit/credit card.
Why not take it a step further, and let me pay using the amazon pay balance i have in my amazon.in account. This could make payments for international customers way simpler.
