Antipodes
CAGiversary!
This is clearly a goof, and it would be silly to think otherwise. The preorder guarantee gives you the best deal, which should be $15 credit.
But honestly, congrats to all the people who got the nice bonus. I'm against people who pre-order games for the credit but still harass customer service for more credit when the price of the game drops (after the game has shipped). The price obviously drops because there is no pre-order incentive anymore! However, when it is a minor mistake on Amazon's side, I believe the onus is on them to fix the their software.
The lesson to take here is to pre-order early
But honestly, congrats to all the people who got the nice bonus. I'm against people who pre-order games for the credit but still harass customer service for more credit when the price of the game drops (after the game has shipped). The price obviously drops because there is no pre-order incentive anymore! However, when it is a minor mistake on Amazon's side, I believe the onus is on them to fix the their software.
The lesson to take here is to pre-order early