 Both promotions were likely designed to take advantage of the attention Amazon Prime Week will get next week. For the first time, Amazon jumping into the world of travel for Prime Day, offering members discounts on summer vacations, like up to 40% off select sailings with Carnival Cruises and up to 30% off Avis car rentals, plus a $10 Amazon gift card. Amazon joining Costco and Walmart, who already offer travel deals for their members.