Cannot redeem for Amazon gift card (For US users)

We apologize for the confusion caused by the complexity of the redemption process. Please follow the steps as follows.

Step 1:

Tap "VoucherCode*" to copy.
*https://plum/gift/********~

Step 2:

Open browser and paste the above URL, tap [Collect Voucher]

Tap copy button to copy the code*.
*https://spend.runa/*******~

Step 3:

Open new page on browser and paste the above URL, copy "Gift Code*" and tap [Apply to your account].
*example: xxxx-xxxxxx-xxxx

Step 4:

Paste "Gift Code" at Amazon.com and tap [Apply to your balance].