Is amazon a merchandising type of business?

Yes it is and the wikipedia article on merchandising would seem to back that:

"Merchandising is the methods, practices, and operations used to promote and sustain certain categories of commercial activity.[1] In the broadest sense, merchandising is any practice which contributes to the sale of products to a retail consumer. At a retail in-store level, merchandising refers to the variety of products available for sale and the display of those products in such a way that it stimulates interest and entices customers to make a purchase."