thats what I was thinking. Email never gave me a reason to think it was fake... cause everything advertised is more so promoting either a new game, the ps store or sony rewards plus it helps that my code worked... but I can see why all the questions are coming up due to other codes already being redeemed and the tweet from @AskPlayStation in response to someone asking about that email address, plus The Show usually makes their announcement on theshownation.com not long after doing a promo of some sort, so I don't think it was something they did either
at the end of the day if your code worked enjoy, if it didn't well I really don't know what to say because this doesn't look like a direct SONY or The Show promo