According to a study by Sage Pay, 46 percent of online purchases are canceled when the user comes to the payment stage of shopping on the Internet.The report says that most online stores are not concerned about tracking customers behavior, so their losses cannot be estimated or calculated. Most websites for online shopping admit they dont know at what exact point a sale is canceled as the customer begins to realize its time to pay up.Sage Pay analyzed the formulas that online stores prefer for increasing their sales. Some 28 percent opt for traditional advertising media with a certain frequency, about 54 percent go for social media and 52 percent choose marketing e-mails and press releases.The mobile market is gaining strength, with 45 percent making sure their websites are adaptable for mobile devices. From 20 to 40 percent of websites offering online shopping generate sales on mobile devices and 93 percent see them as an opportunity to boost their business.Over half the online stores consulted say they have been victims of online fraud this year, and though they invest some 500 euros ($660) in security, 46 percent acknowledge they dont really understand how safe their payment systems are.