Well, if you haven't really notced, AA has been doing this for some time. Sometime last year I noticed all my tickets had (extremely) higher carrier imposed fees separately shown, though the total fare was always as shown on the website when you make your flight selection. I thought that this was a way to devalue the Business Extras earnings but that wasn't the case as BE still gives points based upon the base+ carrier imposed fees. Might be a way to reduce the taxes. Maybe AA wants us to play the fuel dump game, which I still don't fully understand, but then who knows. Ask the experts.