Amazon.com Store Card (Synchrony Bank) is now working
I just received this response from Amazon.com Store Card Support:
"Please accept our apologies for the incorrect information. We are now linked with Mint.com. Please attempt to sign up again with Mint.com."
I had already added the account to Mint.com, but it still said it couldn't connect. I deleted the account and re-added it, and the account connected and pulled down my information! It's finally working!
There are lots of other questions about this, which need to be updated by the Mint.com team: