This article is often quoted when talking about the importance of spending on User Experience (UX).

It says that Jeff Bezos spent 100X more on UX than on Advertising when getting Amazon off the ground.

What have you spent since then, Jeff? Amazon's usability seems somewhere between 1999 Yahoo and "Under Construction" Geocities pages.
https://www.forbes.com/sites/forbestechcouncil/2015/11/19/good-ux-is-good-business-how-to-reap-its-benefits/