I don't have the source handy, but I recall they said that that something like 99% of direct prime fee goes to paying for the video content.
Where they make there money is in the shift in purchasing habits. Prime users spend something like eight times as much money as non prime users. They make their money back because of the large increase of purchase. Overall, the net something like $3/year/prime user.
Where they make there money is in the shift in purchasing habits. Prime users spend something like eight times as much money as non prime users. They make their money back because of the large increase of purchase. Overall, the net something like $3/year/prime user.