Sony has usually offered a sales promotion on their PlayStation Store giving the customers an amount of money back after spending certain sum on their PSN account. The latest promotion has now gone live starting with the same spend $100 and get $15 back offer and it should expire on March 6th.
This deal should be available starting February 27th and will be valid till March 6th. You are required to spend atleast $100 of your money on various PlayStation Store products including DLC or games. Pre-ordering a game or getting PlayStation Plus is also valid for this offer however you need to make sure to spend the exact $100 as required by this promotion.
Users who have fulfilled the conditions for this promotion can get a code offering free $15 credit in their PlayStation Network account. The code will be valid until March 30th so make sure to redeem it before it expires. It will be sent by March 16th at the earliest and judging from the past promotions, it can be slightly delayed as well. You can find it either in your PlayStation Store Email Newsletter or through the important notifications directly on your PlayStation 4.
If you are interested in checking this offer, we highly recommend to take a look at the ongoing PlayStation Plus Specials sale that is offering majority of the PlayStation VR games on a discounted price.