The company has also invested in a number of growing firms, both in the United States and Internationally. In 2014, Amazon purchased top level domain .buy in auction for over $4 million. The company has invested in brands that offer a wide range of services and products, including Engine Yard, a Ruby-on-Rails platform as a service company, and Living Social, a local deal site.
With Prime Pantry, which also launched in 2014, Amazon honed its focus on competing with the Walmarts and pharmacies of the world by giving Prime subscribers an easy way to fill one giant box with household supplies and other nonperishable goods. In 2015, Amazon launched a home services arm for everything from house cleanings and oil changes to furniture assembly and theater installation.
Amazon allows users to submit reviews to the web page of each product. Reviewers must rate the product on a rating scale from one to five stars. Amazon provides a badging option for reviewers which indicate the real name of the reviewer (based on confirmation of a credit card account) or which indicate that the reviewer is one of the top reviewers by popularity. Customers may comment or vote on the reviews, indicating whether they found a review helpful to them. If a review is given enough "helpful" hits, it appears on the front page of the product. In 2010, Amazon was reported as being the largest single source of Internet consumer reviews.