I don't know if this is a generic error and they are out of Factorio keys, or if it's a personal error for me because I bought the game too many times already. If it's the latter, I think it's a bit silly to put a limit on it.Order Canceled
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Either way, what can I do to be able to purchase more copies through the Humble widget? I tried a different email address but that didn't work, and I don't have any other payment method to try (and unfortunately going through Steam is not really an option in my particular case).