Prime Visa fine print:
From October 2, 2017 9:00 AM PDT until October 8, 2017 11:59 PM PDT, get a total of 15% Back rewards on your first item purchase in select Amazon.com categories using your Amazon Prime Rewards Visa Card. That's an extra 10% Back rewards in addition to the 5% Back rewards you earn on Amazon.com purchases with your Amazon Prime Rewards Visa Card. Offer good while supplies last. This promotional offer only applies to the portion of net qualifying purchases (purchases less returns and other credits) of eligible items paid for with your Amazon Prime Rewards Visa Card at Amazon.com. Extra % Back rewards will post to your account within a week of the transaction posting, and will appear on your monthly credit card billing statement and be available for use within 1-2 billing cycles. To qualify for this promotional offer, you must not have made a previous purchase in the select Amazon.com category from your Amazon.com account and your account must be open and not in default at the time of fulfillment. This promotional offer is non-transferable. Amazon reserves the right to modify or cancel this offer at any time. For more information about your rewards program, see your Rewards Program Agreement.
Prime Store Card fine print:
Limited time offer while supplies last and subject to credit approval. Offer expires at 11:59 p.m. PDT on October 8, 2017. Offer only applies to your first purchase in select Amazon.com categories. Offer only valid for Amazon Prime Store Cardmembers and authorized users of an Amazon Prime Store Card who have not made a previous purchase in the select Amazon.com category from their Amazon.com account. Offer is comprised of the standard 5% back offered to Amazon Prime Store Cardmembers, plus an additional bonus of 10%. Offer only applies to eligible items charged to the Amazon Prime Store Card. Items fully or partially paid by another payment form including but not limited to gift cards and rewards points may not receive the percentage back bonus. Offer may not be combined with any Special Financing or Equal Pay offer. Offer does not apply if you select a Special Financing or Equal Pay offer to apply during checkout. Offer only applies to the portion of net qualifying purchases (purchases less returns and other credits) of eligible items paid for with an Amazon Prime Store Card through Amazon.com. Offer does not apply to shipping charges, taxes or other fees associated with the purchase of an eligible product. Please allow up to two billing cycles for your statement credit to post to your Amazon Prime Store Card account. Offer is non-transferable and may not be resold. If any products related to this offer are returned, your refund will equal the amount you paid for the product, subject to applicable refund policies. If you violate any of these terms, the offer will be invalid. Amazon reserves the right to modify or cancel the offer at any time. For more information and full terms, see amazon.com/storecard.