On Amazon Payments, the small transaction are more expansive than the bigger one. For example when you pay 0.99$, it's actually 0.893$ = 90.2% (5% + $0.05) but

On Amazon Payments, the small transaction are more expansive than the bigger one. For example when you pay 0.99$, it's actually 0.893$ = 90.2% (5% + $0.05) but if you pay 20$, it's 19.1287$ = 95.64%. There's 5% more in their pocket.