Almost 50 percent of all online retail sales in the United States happen on Amazon.com. Even big brands like Walmart, Macy’s, and Costco struggle to compete with this online giant. With free two-day shipping, a reviews system, and an easy return policy, Amazon makes sense as the leader of online retailers. That being said, a few e-commerce stores have discovered ways to offer products that allow them to compete in the noisy online market.