Amazon offers its Amazon Mom 1-Year Subscription for $99; this includes free 2-day shipping on all orders. Plus, new members can take an extra 20% off select Pampers diapers when purchased via Subscribe & Save. Even better, new members will also receive a $20 Amazon credit for free once their order ships. Customers who have not used Amazon Mom in the last 12 months and who join by April 2 are eligible. The diapers purchase must be made by April 15, and the credit expires May 31.