Hate to be that guy, but I have Amazon Prime in my household because my wife uses it just enough to be worthwhile. She makes only a small percentage of her purchases there, and the others in our household make none.
The 43% figure is more relevant, and that's 43% of a relatively small share of all consumer spending, with much of it being done by a small group of large Amazon customers.
So I don't think it's accurate to say most people buy a shitload of stuff from Amazon.
Amazon’s US retail revenue was $318B for 2017 [0]. There are 126M households in the US in census’ 2017 data [1]. Thats $2,500/household. That’s definitely a shitload bought by most people.
Comically shitloads are pretty cheap and are $210/ton (a big pickup kid) if you’re in New Hampshire [2]. So pedantically, we’re all buying 10 shitloads.
From your link it says,"Though Walmart remains king of sales with $495.8 billion in annual revenue and U.S. sales of $318.5 billion (a 3.5 percent increase year over year) for the fiscal year ended in January, Amazon is growing at a faster pace in the United States."
You are claiming that Walmart's revenue is Amazon's. You misquoted.
Okay...here's more statistics for you. 75% of American online shoppers use Amazon for most of their online shopping [1]. 80% of Americans shop online [2]. So approximately 60% of all Americans frequently shop at Amazon.
The 43% figure is more relevant, and that's 43% of a relatively small share of all consumer spending, with much of it being done by a small group of large Amazon customers.
So I don't think it's accurate to say most people buy a shitload of stuff from Amazon.