Given that the surcharge if flown on BA each way would have been $724 booked as 2 one ways ($478 eastbound and $246 westbound), but would have saved many hours and 115,000 points per person
It is putting an extremely low value on the miles to use 115,000 miles to save $724 - 0.63c per mile
If booked on AA on the transatlantic sector, there would not be a surcharge