Try what I did
here: Include as many of the following as you can: Incognito Edge browser (or different browsers), a different home address, using this
PreQualified Link, with VPN running, at the top of an hour. I just tried it again and it showed a Platinum offer of 100k. I'm not sure when the pop-up occurs, because I've only ever applied for two Amex cards. But I feel like if they make the offer, you're good. My support on DISchurners was only showing 60k for me. Neither of these trials were incognito. Good Luck!