As part of Prime Day, Amazon has several In-App Purchase Deals for apps in the Amazon Appstore. Among the deals is $10 Amazon Credit to any Prime member who newly subscribes to HBO Now, Showtime, AMC Premiere, Boomerang, or Daily Burn. Simply open the app on either a Fire TV or Fire Tablet and subscribe through the app. Shortly after, you’ll receive an email informing you of the $10 Amazon Credit that has been applied to your account. The terms and conditions for this promotion seem to imply that you can earn $10 for each subscription, but I’m not entirely sure if that’s the case or if you may only earn a single $10 credit. It’s also not clear if you get to keep the credit if you cancel before your free trial for the subscription is up. If you’re going to be taking advantage of the these or other in-app purchase deals, consider stocking up on Amazon Coins first and paying with those since they’re on sale as well.