Usually Amazon doesnt give you $20 from digital games. I have been buying for years and never once saw a $20 credit on digital. I wish they would for preorders, but all the EA games that have credit (crysis 3, dead space 3) the boxed versions include an origin code to redeem.
Well technically you kind of are. If you want online play you need an origin account to log in. Crysis 2 had gamespy and crysis 3 has origin... thats how the beta was. Had to log into origin to play multiplayer.