Citizen Kurisutaru ....to answer you it's simple enough to explain the subscription system to Norton. If you do not subscribe you do not get any updates.....your computer will be protected to the time/point when you ceased being an on-going customer.
If a newer virus comes along...well, tough luck...you'll possibly be infected and your system will be fubarred.
Maybe it's good to know that if you only cease being a Wincustomize.com site member/contributor all that will suffer will be your GUI's aesthetics.
Either way, it's the price you pay for .....not paying.
And...
Logically, if something 'may or may not happen...and is an exaggerated model' it hardly proves any point at all other than a propensity for flawed reasoning....