Sony has seemingly disabled the ability to redeem PlayStation Plus codes from third-party retailers, or via the PlayStation Store.
Some users have tried to extend or ‘stack’ their PlayStation Plus membership after news broke that those with simultaneous PS Plus and PS Now subscriptions will get upgraded to PS Plus Premium in June, with the length of the new subscription being equal to their longest current memberships.
But, after purchasing a PS Plus code, users then reported the codes being rejected after an attempted redemption.
Many users had already stacked PS Now memberships, after it was announced those with a PS Now account would be upgraded to PS Plus Premium at no extra cost.