Spend $100 Using PlayStation Store Wallet and Get Back $15 Credit
The PlayStation Store has a special offer in place for PSN users and buyers from October 6th to November 3rd:
So if you spend $100 using the PSN Wallet during the aforementioned dates, you’ll receive a $15 credit for use on PSN.
The code for the PSN credit must be redeemed by December 15th. The code will be sent out on or before November 17th via XMB message on PS3, system notification on PS4 and PS Vita or the email account used to set up an Account Sign-in ID.