Amazon Subscribe and Save gives you 15% off on your order if you schedule 6 or more items. Economies of scale to drive prices down by 15% over what you would n

Amazon Subscribe and Save gives you 15% off on your order if you schedule 6 or more items. Economies of scale to drive prices down by 15% over what you would normally pay do exist. E.g. Amazon can save money individual per-unit shipping costs by sending the entire shipment over in one go every month. The promise (and likelihood) of continual recurring revenue means the net margin made per transaction can be lower yet still sustainable for Amazon, while benefitting the consumer.