i just added a year of Essential this morning from a code I got from a Coli breh.
basically i get ps plus essential with the code I got for another year (currently up to 2024). I have like 600 days remaining of essential now. But if I want to convert my PS Plus essential to Ps Plus extra for the same time period, I can pay a one time fee of 69 dollars and to have premium for the same time period, 103 dollars.
the problem isn't stacking plus essential which you can do now and I've done this morn. It's finding the cheapest way to get PS Plus PREMIUM