Dear ******, As a thank you for being an Amazon customer that has recently shopped on Amazon.com via an Android phone, or through the Amazon App for Android, we have placed a $25 Amazon Appstore credit onto your account; valid toward Amazon Appstore games, apps, and in-app items (excluding subscriptions). We will automatically apply the balance of your credit to any purchase of apps, games and in-app items made from the Amazon Appstore before March 15, 2016 at 11:59 PM PST.
Most probably targeted.