You appear to have beaten the system if you purchased and stacked many PS Now memberships to receive a 50% discount on the future PS Plus rollout. Congrats!
Following the introduction of the update, bargains guru @Wario64 discovered a loophole that effectively allowed gamers to purchase a yearly PS Plus Premium subscription for half the price.
Current PS Now users will be upgraded to the top-tier PS Plus Premium membership as part of the new PS Plus program. Because there is a significant price difference between the two, shrewd customers flocked to take advantage of the situation before Sony shut it down. However, everyone who takes part would make out like a bandit.
Sony stated that existing PS Plus subscribers would be downgraded to the PS Plus Essential subscription. Meanwhile, PS Now subscribers will be upgraded to the top-tier PS Plus Premium service.
PS Now costs $59.99/£49.99 per year, while PS Plus Premium costs $119.99/£99.99 per year. It's easy to see where this is headed.
People hurried to buy and stack as many PS Now annual memberships as soon as word of the reorganized plan became public this summer. Some were able to amass up to ten years' worth of subscriptions before Sony discovered what was going on and shut down the activity.
They saved half the price on numerous annual memberships to the most costly and all-encompassing PS Plus tier.