Hello, I have built a web application with Express Checkout via REST API(Express Checkout API). Actually we sell digital goods - pictures & movies less than $10, so I changed my payment solution to "PayPal Digital Goods (Express Checkout)" and the application has been approved. When I purchase one of our products, fee is at the standard rate, not the micropayment one. What should I do to use PayPal at the micropayment rate? I have googled so many times, but I could find information about Classic APIs, not REST API. For example, I think I have to mark the items as "digital goods", but I don't know how to achieve it on REST API. Thank you.
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