wish i had got a AMEX card back in 80's and put it in a safe deposit box after I paid the annual fee, then cancel it when the next AF was done.
There is no signature card for Delta. Unless you are talking about Visa Signature, it depends.
He was talking about using the 5k CL on his AMEX card to qualify for a Signature VISA, creditors want experience with a 5K+ CL before they qualify you for a Signuature card.
+1 Congrats again!
I still remember the utter shock I had when AMEX let me in, so awesome!