I see… Still in doubt we are authorized resellers. We guarantee our keys will never be banned from Steam. In case you run into trouble (again: which won't happen), we will refund you 100%.

Other than that, each purchase of Dark Souls III comes with Bandai Namco VIP points to be redeemed on their page. It's Bandai's VIP program and keys to redeem there are solely available from authorized resellers. You may compare that with Amazon, if you wish. They have them also.