While preservationists lucked out when PlayStation decided to not shut down the digital storefronts for the PlayStation 3 and PlayStation Vita, it seems like Sony is still keen on reminding players that these two systems are definitely on their way out, eventually. Starting on October 27th, credit and debit card payments as well as PayPal will no longer be accepted as valid options on either the PS3 or Vita. You'll still be able to make purchases, but it'll require you to specifically buy PlayStation Store gift cards to add to your account balance, through the web PSN Store or on PS4 or PS5, after which you can then use to buy games.
From 27th October, 2021, you will no longer be able to use a credit or debit card or a payment method such as PayPal to buy digital content or add funds to your wallet when visiting PlayStation™Store on your PS3™ console or PS Vita system.
To buy digital content for your PS3 console or PS Vita system, you must first add sufficient funds to your wallet on PlayStation Store. You can add funds by redeeming a PlayStation Store gift card, or using a credit or debit card, PayPal, or other available payment method via a desktop computer, mobile device, PS4 console or PS5 console.
How will this affect games with an in-game store? Can I purchase DLC in an in-game store?
You will still be able to purchase content (including DLC) via in-game stores, but you will need to use wallet funds to pay for the content on PlayStation Store. You will not be able to use a credit or debit card or other payment method such as PayPal to complete the purchase.
Can I still use PlayStation Store gift cards on my PS3 console or PS Vita system?
Yes, PlayStation Store gift cards can be used on both PS3 consoles and PS Vita systems. Product vouchers and subscription vouchers can also be used.