I also have it for free also, if they ever offer you a free year you should take it because they give you something free every month usually around $10. My guess is that it’ll be 30% off for everyone tomorrow because it says it expires today for members.
This person had something similar happen. You might get help in the seller forums for it. https://sellercentral.amazon.com/seller-forums/discussions/t/8893b034-c2a2-4623-b3d2-9c7fb1133631