And amazon barely makes any profit, so its not clear that their business actually does scale, if they didn’t have AWS.
Their goal is not to make a profit or they would be
AWS is their business and it certainly scales. Their goal in retail is market dominance through convenience and that still costs a ton of money. AWS does not cost a ton of money.
Amazon is not just moving goods, they have AWS as well and that scales very well.
Not more? Wikipedia claims Amazon has 647,500 employees.