Increased usage and acceptance of mobile coupons will ensure future digital coupon growth. “Several factors account for the rise of digital couponing,” said Jeffrey Grau, eMarketer principal analyst and author of the new report, “Coupon to Groupon: New Channels for an Old Tradition.” “The recession, the increased use of the internet as a shopping and research channel, and, of course, the immense popularity of daily deal sites like Groupon and LivingSocial have created a new form of online deal hunting.” This year, eMarketer estimates, 88.2 million US adults will redeem an online coupon or code for use either online or offline at least once. Get the full story at eMarketer