You must use a game center account in order to get this. Download this game,
Sushi Boy Thunder (free) Link: http://itunes.apple.com/us/app/sushi-boy-thunder/id445672876?mt
Just play through one game (only takes about 15-20 secs) and after you die,
there will be an ad on the top of the screen to claim a free $5 bestbuy
rewardzone certificate (250 points). All you have to do is enter your email
addess and they will immediately send you a claim code that you enter in
your reward zone account and the points apply immediately.
Don't know if it works for android though. I also tried to use a second game
center account and sadly it didn't work on same phone.