Web App to Buy a $10 gift for $5

Stage: Development in progress

Type: Website

The user pays $5 to see a list of 50 products, each priced at $10 commercially. The user picks one product from the list and gets it shipped for free. How do we make a profit? For each of the 50 products, the vendor paid 15 cents for the host website to be viewed by the user. The host site makes $2.50 profit on each transaction.