Do you have a legitimate source? The only thing they cite is a kotaku article that just talks about people scamming.
English
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http://www.forbes.com/sites/davidthier/2015/07/03/people-have-learned-how-to-cheat-destinys-red-bull-promotion/
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That doesn't talk about the promo being shut down...
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Type in any variation of 3,4,7, V and F to get a code. There are other combinations as well. Test it yourself.