In a virtual shop a shop can sell products in the Internet.
Because of the large exposure of products in the App Store the simplest way to sell products in the App Store is to sell them using the standard Apple mechanism.
However, in this way the shop will have to pay 30% of its revenue to Apple. Sometimes it is higher than the revenue of the shop.How to address this problem?
One of the solutions is that the billing of the products will not be done by Apple. Instead the billing will be by using PayPal , Tranzilla and other Internet gateway solutions. This way the shop will not need to pay anything for Apple for selling a product and the iPhone application will be a free one.