point is that in the games i cracked with the supposed fade all checks were based on a key, which mostly broke down to 1 routine returning in a boolean for success / fail...
its not even worth calling it a 'protection'.. on the pc it rarely kicked in, except in bad cracks... and we did test it extensively in fairlight, you're not 100% correct when you say legit key.. other non legit keys worked too.. look closer at the algo
.. that, and you're about 8 years late...