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Visa cards, no, not at this time. But they do have others, such as giftcards for amazon.co.uk and amazon.de

I would rather use purse.io for amazon purchases as I can get a 25% discount. Hopefully they will resolve visa issues soon.

As he is a US based company, I'm not sure if European Visas will be a thing, as they would have to be shipped.
But maybe! Never know. :)

It seems that all issuers of prepaid Visa cards in Europe went through a company called wave crest and visa recently stopped doing business with them. Hopefully there will be an alternative soon.

Now that you mention it, I did read that a couple weeks ago.