The advantage of an Affiliate store vs a traditional ecommerce store is that YOU DON’T BUY THE INVENTORY! You are marketing the products for the suppliers (you are their affiliate). When a customer clicks on an item to buy it it takes them to the suppliers site to complete the transaction.
You also get credit for any other items they buy while they are on that site.
But you never have to hold the inventory, pack and ship the item, deal with credit cards etc. BUILDING AN AFFILIATE STORE IS A SWEET DEAL!
What are Data Feeds?