The promotion offered to get a game-key for Battlefield4 with the purchase of an R9 series graphics card was specific to brand/models of R9s as well as what retailers sold them.
The coupon-codes to get the BF4 game-key were being provided by the AIB (Sapphire, XFX, MSI, ASUS, etc..) directly. Many AIBs sell various versions of Radeon products - and this is no different for the R9 products. So not all R9 video cards would be coming with the a coupon-code. You then also needed to figure out if the retailer was selling that model of R9 that came with the card.
All this should be able to be determined from this link: http://sites.amd.com/us/promo/battlefield/Pages/battlefield4.aspx
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