Interesting article. Not a lot new here except the bar graphs showing the difference in frequency of purchases between Prime members and regular customers is revealing.
https://www.npr.org/2018/06/06/615137239/what-americans-told-us-about-online-shopping-says-a-lot-about-amazon
#Market Share
Mind share too. So many people have Amazon accounts and trust them that there is very little friction in getting them to click and order.
What I would like to know are the trends of sales on Amazon that are from third-party sellers; what's the percentage and which way its heading?
edit:
Found it!
https://www.statista.com/statistics/259782/third-party-seller-share-of-amazon-platform/