I received a letter from Citibank last week offering to replace my current Citi AAdvantage Visa with Citi AAdvantage Platinum Business Mastercard. This is a new twist in Citibank's ongoing quest to get me away from my Visa-brand card. 7500 bonus miles is a pretty good deal, and one I'd consider, but the only problem is, I don't run a business! Why would they send me this offer? I don't have a "legal structure" and "authorized officers".