Like this, but virtual. (KogeLiz)A whitepaper written by a University of Texas economist and the staff of coupon site RetailMeNot.com came to a shocking conclusion: consumers can save a lot of money by using RetailMeNot and other online coupon and savings resources. How much? The site’s own statistics show that shoppers save around $17 per purchase by using deal websites, and parents with children at home saved almost twice that amount. Of course, that statistic would mean that the average online shopper was making 11 to 12 purchases per hour, or buying one thing every five minutes.