Thanks so much for all this info. Quick,question - how long after Explorer approval were you able to see Gateway account set up. FYI I have plat edge already so MR already set up.
About 24 hours after approval, I saw my Explorer annual fee listed under my Edge Ascent account. I rang Amex to ask and they said the cards were linked so I asked Amex to unlink them... About 24 hours after the phone call, I could see my Gateway account online.