Join Date: Dec 2005
Location: NYC
Programs: SPG, AA, BA, CO, UA, US, B6, DL, Amex MR, HH
Posts: 1,010
It wouldn't really be that mysterious - all they'd have to do is pull a credit report (which I believe they can do soft pulls every so often without notification) and the new Citi accounts would show up.
I also recently opened Citi/AA accounts.
Also, Chase confirmed what grlmopz said upthread: 3.75 miles/$1