Ecommerce sites are profitable because of the low overhead costs. You don’t need to pay rent, maintain a brick-and-mortar storefront, or pay the utilities associated with retail. It’s also possible to run an ecommerce site on your own without any employees—further reducing your costs and increasing profit margins.  Dropshipping is a popular and low-risk way to run a profitable ecommerce site. With dropshipping, you don’t have to purchase products in advance or handle shipping and fulfillment.