The Amex Platinum Card is by no means the only card like this — I've
heard infrequent travelers quote the Admirals Club membership that comes with some credit cards as a reason to pay an annual fee when it would be cheaper for them to by day passes — so every single credit card you hold should be subjected to the same scrutiny.
This post was inspired by a recent thread on FlyerTalk, but in the past week I've also been
hearing stories from my own family, who like Southwest precisely because they don't offer all these elite trappings that make an
infrequent traveler feel like a second class citizen.