It could work because AA does not outsource mileage purchases to a third party. The problem is that buying miles is only cost effective if you buy a large amount, because that is the way AA structures their promotions. A large purchase is less likely to be mistaken for a fee.
This works:
https://www.aa.com/i18n/aadvantage-p...multiplier.jsp
Has someone confirmed that this works?
Also has anyone confirmed the 500-miles purchases?