Like several people here, I've been seeing the "You're pre-approved for the Plum Card!" banner for the past few days on AmEx account overview page. Today, I was looking through their other card offerings and I also got a "You're pre-approved!" button on the Platinum Card page.
Not believing it, I called CS and it turns out I am not pre-approved for Platinum.
YMMV, but I wanted to share this with anyone else who might have gotten butterflies at the prospect of carrying a grey gladiator.
=========== TU: 745(TU98) | EQ: 774 | EX: ? | NO BADDIES! What's in my wallet? AMEX Platinum, United Presidential Plus World Elite MC, AMEX JetBlue, Nordstrom Visa Sig, Chase Sapphire Preferred, Discover More, AMEX Zync, Citi AAdvantage Plat Select Visa, Banana Republic, Home Depot