You can consider amazon a social networking site since you’re chatting with people when you are buying or selling something. You also can contact amazon whenever you’re having a problem with a seller or product.
Amazon happens to be many things rolled into one. Amazon is a book publisher. One can publish ebooks and paperbacks in Amazon KDP. Amazon is a marketplace. It sells various items. Amazon also pays for ads. It is a networking site.
These are just to name a few. Amazon is a giant in online activities.
In fact, the incredibly popular customer reviews sections that can be seen all across Amazon are so popular that they virtually qualify as their own. It is like a social network for buyers and sellers.