This deal is definitely some incentive to become a Prime member if you are not already.
The $10 promotion credit can be applied to almost any purchase during Prime Day. Plus, it's valid for both online and in-store purchases--so even if you are ordering your Whole Foods for delivery or pickup, you can still qualify for this credit.
According to Amazon's website, there are a few restrictions on what purchases can work toward earning this credit: "Alcohol, taxes, tips, stamps, gift cards, delivery fees and regulatory fees (including California Refund Value and bottle deposits) do not count toward the $10 minimum."
Besides that, once you spend your $10, you will get an email from Amazon confirming the credit.
Then, you simply follow the emailed directions to get the $10 credit on your Amazon account.
With that in mind, if you need a trip to the grocery store, now's a perfect time to head to Whole Foods--and then you can save on your Prime Day orders!