The Ameriprise Plat Amex application page is a dead page. I tried to apply for this card several times a while ago and got nowhere. I spoke to Ameriprise and they referred me to Amex. Spoke to Amex and they referred me to Ameriprise. Escalated and no one knew anything.
Gave up. I think they quit offering this product (at least via web) and forgot to take the page down.
jb