AMX Questions
 

Since AMX tends to be a bit secretive...

Does anyone know what the specific qualifications for their cards are?

The reason I ask, it seems their Platinum card has gotten easier to get. It used to be a bit harder to get; now all someone has to is go to the site and apply for it. Seems to take the mystique out of it. I guess thats left to the Centurion now...

Centurion = $250K yearly spending
Platinum = no more invite only, you can apply as long as you are willing to pay $395 annual fee

Did you search the AMEX forum?

pretty sure plat has always been an apply for card in US.. in a number of other countries it is invite only like cent.

In 1966 American Express introduced the Gold Card and in 1984 the Platinum Card, clearly defining different market segments within its own business, a practice that has proliferated across a broad array of industries. The Platinum Card was billed as super-exclusive and had a $250 annual fee. It was offered by invitation only to American Express customers with at least 2 years of tenure, significant spending, and excellent payment history.

http://en.wikipedia.org/wiki/American_Express

This matches my own recollection.