American used to share a ton of information about the financials of the AAdvantage program in their annual 10-K SEC filing. They stopped doing that last year. They no longer tell us how many members there are in the program, how many miles were issued, sold to third parties, and remain outstanding like they did up until two years ago.
Nonetheless as a result of their newly filed 2017 SEC 10-K form we know that the percentage of American’s seats occupied by award travelers dropped again in 2017, after a drop in 2016. When US Airways management took over there was clearly a new philosophy of not releasing award seats to customers.