3. Online sellers can include QR code in each physical items they sell, say Books, T-Shirts, Coffe Cup, to its URL on the site. That way, if your friend wants t

3. Online sellers can include QR code in each physical items they sell, say Books, T-Shirts, Coffe Cup, to its URL on the site. That way, if your friend wants the exact same thing, he just scan the qr code, go the link and buy. It may be even awesome if, each qr code is custom qr code, which has user data in it, that way, if a friend buys a book through the qr code from my book, I get the referal bucks, but, It will be touch to implement a custom qr code in each product.