Great find OP. Does anyone know if you can do this for multiple Citi checking accounts to the same AA account? If so, this is great.
You can earn 10,000 American Airlines AAdvantage® bonus miles by enrollment of a Citibank® / AAdvantage® Debit card during this promotional period. Limit one offer per account.
According to the terms, I interpret this as one bonus per Citi account, not per AA account.