Reston, VA (RestaurantNews.com) Like to save money? Most people do. Digital Diner recognizes that need and now supports the use of promo codes for use with their online ordering platform. When using promo codes, the possibilities are endless for the restaurant and will keep your customers coming back for more. Restaurants have the following options with promo code usage: For use on particular days or specific times For one time use or multi-use On a full order, specific categories or specific items On delivery, pickup, pre-order or all of the above For use with either cash, credit card or both