1. Spend Over $65 & Get Free Shipping
They offer a revolving free shipping offer to customers when they spend a certain amount. Past customers whose orders totaled over $65 were given a free shipping coupon code to enter during checkout. These types of free shipping offers are usually advertised via their homepage.

2. Join DDS Rewards
Membership for DDS Rewards is free and as a member you’ll earn one point for every dollar you spend. Every three months, they’ll tally up your points and will email you a discount coupon based on how many points you’ve earned during that period. You can receive up to 20% off a future purchase.