Amazon has over 300 million active customer accounts and tens of millions of Prime members in the US alone. They provide scale and ability to convert online retail traffic. Amazon Fulfillment by Amazon (FBA) provides storage, customer service, and logistics support. Sellers can reach customers in the US, Canada, Mexico, Japan, UK, and Europe. Amazon also has a built-in ad system and their new Merch by Amazon on-demand t-shirt printing service which sellers can take advantage of with minimal startup costs by leveraging Amazon's customer base and without holding any inventory.