Dude, I think they actually ripped off another cart design as a clone, then got cloned themselves so they had to add software authentication which results in no decryption/not running directly on non-N5 cards, and when the last method got cracked, well, they had to rejigger it again...
Rejigger, now that sounds like something snoop dog would say... Rejigger my ni***r fo shizzle, dizzle.