It will be a bit more difficult to purchase digital games on the PlayStation 3 or the PlayStation Vita. According to a support documentation, starting October 27th you will not be able use a credit card or debit card or PayPal to buy games or add money into your wallet on these systems. You will need to purchase a PlayStation Store gift certificate or load up your wallet on your PlayStation Store account via the internet, on your phone or on a PS4 and PS5.
This is just the latest in a long line of disappointing changes that Sony has made regarding its support of older consoles. Sony had announced in March that it would close the PlayStation Store for Vita and PS3 but reversed its decision a few weeks later. On July 6, Sony said that it would end all PlayStation Portable purchase functionality. This means that you cannot buy DLC for PSP games.
You can still purchase PSP games via the Vita and PS3 digital storesfronts, if you wish. You'll need to ensure that you have enough money in your bank account in order to purchase PSP games starting in the next few weeks.