Amazon’s Prime Store Card automatically nets you 5% cash back on all Amazon purchases, but from now until the end of the month, they’re bumping that to 10% for Canon cameras and lenses, including rarely discounted high-end gear like the 5D Mark IV.
Note that the Prime Store Card is NOT the same thing as the Amazon Rewards Visa. Both cards include 5% cash back, but the Visa is a full-on credit card, while the Prime Store Card can only be used on Amazon.com.