Originally Posted by
facehu
From reading the story and comments, it appears to require
1. A Discover checking account which, according to the comments, is closed for new sign ups at the present time
2. A contactless debit card, which again, according to the comments, Discover does not have currently (apparently chip only).
If the above is correct, then this is a deal that literally doesn't exist currently.
The fact that your 'deposit' was rejected and returned to your GC means just what you wrote, it wasn't deposited into your Discover account, i,e, Discover rejected it.
Let us know if you have any success with this.