I looked at my existing pre-orders on Amazon and I saw the following message:
Any applicable gift certificate and promotional balances will be applied to this order on release date.
So I assume that means the pre-orders will be taken out of my credit.
Amazon's pricing on pre-orders still confuses me. For example I have the book From the Charred Remains (Lucy Campion Mysteries) by Susanna Calkins on pre-order. On the list of Pre-orders on the MYK page the price shows as $12.92. Then when I click on the order summary for that title it says it's $10.67. When I look at the product page as it is today it's $11.04. I wonder if you automatically get the lowest price when you pre-order--does anyone know?