Displays Gravatars of customers who have purchased your product.
It works by using the customer’s email that they used to purchase your product, and checking it against Gravatar.com. Only unique email addresses are used, so if a customer purchases your product more than once, it will only show their Gravatar once.
To show the Gravatars of customers who have purchased your product, use the [edd_purchase_gravatars] shortcode, or drag the provided widget into the sidebar of your single download page. You can also show the gravatars of a particular product anywhere on your website using the template tag or shortcode, by passing in the download’s ID.