Is there something I'm missing here? AMEX sent me a letter last month, saying that I "pre-qualify" for Centurion. I didn't notice anything about CO Gold though. I'm Silver, and I don't travel enough to be gold. How does this work? Do you stay gold for as long as you have the card? And if you have an AMEX Platinum, do yiu stay CO Plat for as long as you have AMEX Plat?