From what I can gather and it is not much, so long as the person keeps their Premier sub going they keep all the benefits. Once the sub expires from what I can gather you lose all that enhanced functionality that is locked behind the Premier sub, as well as access to the Premier tier free content.

You know you enjoy 3D Art when you realize that your life is a piece of 3D Art. :)

AMD 7900X3D, 64 GB Corsair Vengeance DDR5 Ram, Asus Prime X670-P Wifi MB, PNY RTX 4070Ti Super 16GB, 14TB SSD's & HDD, Windows 11, Poser 9 / Pro 2012 / Pro 2014, Daz Studio 4.22.