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The Amazon Rewards Visa card isn't a hard card to obtain. Not saying the outcome will be the same for the OP but I've seen many, many folks on here get approved for this very same card as a Visa Signature with a $500 limit.
I recently got approved with an SL of $3900 even though I had a 7 - 10 day message on the automated line. It was verification in my case. So, all is not lost. Good luck!