Amazon.com is rolling out deeper discounts for its Subscribe & Save service, offering anyone who subscribes to five products during a month a 15 percent discount.

The move aims to boost usage of the program and reward heavy users. Subscribe & Save normally offers more modest discounts to subscribers based on their subscriptions to individual products.

As part of the new bulk discount, customers can set five or more items that they’d want delivered on a monthly basis. Amazon says in an announcement that the 15 percent discount will apply to the “entire monthly delivery when you have 5 or more subscriptions delivered in the same month.”

Items included in the program include staples such as laundry supplies, beauty supplies, vitamins and baby care products.  Free shipping applies to Subscribe & Save items. The service doesn’t require a subscription fee.

Post updated to clarify the new elements of the program.

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