Originally Posted by akcae

I did this. I applied for the personal Citi AA Visa last year before I knew about the two-browser trick and Citi's policy on personal card approvals. Starting in October of last year, they kept sending me this solicitation for the "add-on" Amex, and I finally took it in February. It's linked to my original card in a sense that as long as I keep it, the Amex has no annual fee. I received 25,000 AA miles after I put $750 on the Amex.

No clue what this does to my ability to "churn" in 12 to 18 to 24 months.