Jen and Ashwin
DIS Veteran
- Joined
- May 28, 2015
It does lock you out of the SUB. I believe the preferred strategy is to sign up for the Plat and then immediately accept the upgrade offer. Highly unlikely they hardpull for just an upgrade, new accts are YMMV for hard pull with Amex.
Does signing up and then upgrading mean that you have two cards of the same type or do they combine them?