Apple gave you a refund and a free case and now you want to try and steal from them?? Why not just go around to all the Apple stores and break in and steal as much stuff as you can while you're at it?? Don't people have any morals anymore? Hope you successfully hack the app and get busted! That would make me HAPPY!!
In any case, I would have thought you can only get one per iTunes account, and Apple would probably check that the iTunes account has an iPhone 4 IMEI registered to it.