Can I use Amazon gift cards, promotional discounts offered by Beautybyearth.com, or points when I use Buy with Prime?

Amazon.com gift cards, promotional discounts offered by beautybyearth.com, or points can’t be used as a payment method to place an order using Buy with Prime. Amazon.com Gift Cards can only be used to purchase eligible goods and services on Amazon.com and certain related sites, as detailed in the Amazon.com Gift Card Terms and Conditions.