It is a real site, yes. The owners are CJS-cdkeys.com and I have bought games from them in the past. Not sure why anyone would think this is a scam, they buy keys in bulk and sell them at a lower pricepoint than you'll find on Origin. If you're considering buying from them but concerned about safety just use PayPal if you can. They tend to deliver keys almost instantly after payment too, everything is automated by their own software called AutoKey.