Originally Posted by Blumie
The rules only require that you pay with an AMEX product; the rules do not indicate that you have to pay with the Centurion or Platinum card. However, as others have pointed out, the rules also explicitly state that you have to book through AMEX.
Does anyone know the IATA number for AMEX Platinum Travel Services then? (If you have purchased an airline ticket from them, you can find this number on your ticket)