What you mean by 'patched the game for region free'?
You install the exploit on the Cubic Ninja card so you don't have to find the QR code every time. (To show nothing installed on your out-of-region game, try restarting your 3DS then attempting to play the out-of-region cartridge without doing anything with Cubic Ninja).Oh I thought you had to install something
Futureproof? No. RegionFOUR can be blocked by Nintendo tomorrow.
As long as you stay on fw 9.8 and below you should be able to launch out-of-region games using regionFOUR (well, preferably on fw 9.2, so that you can do more interesting stuff).
PS: Next time please don't choose title like "are you a.......... gay"?