What happens when there is a refund on a pre-order that is paid with a gift card?

Purple Dot will refund the debit/credit card first. Any remaining refund goes onto the gift card.

Let's say the shopper purchased Product X for $100 ($80 was paid via debit card and $20 with a gift card). 

If there is a refund for $30, all $30 would be refunded to the debit card.

If there is a refund for $90, $80 would be refunded to the debit card and $10 refunded to the gift card.