One example is the entry zone at the front of the store - you'd think that's a prime location for signage, deals, brochures, etc. But when you're headed through the door into the store you see almost nothing and stop for almost nothing, and then (in America) you tend to drift to the right and then you're 'in' the store. If you put a store directory just inside the door, nobody uses it. Move it back a bit so you can find it once you're into the store and suddenly it's heavily utilized. He has hard observational data for all these, so they're compelling in addition to being fascinating.
The company launched amazon.com Auctions, a web auctions service, in March 1999. However, it failed to chip away at the large market share of the industry pioneer, eBay. Later, the company launched a fixed-price marketplace business, zShops, in September 1999, and the now defunct partnership with Sotheby's, called Sothebys.amazon.com, in November. Auctions and zShops evolved into Amazon Marketplace, a service launched in November 2000 that let customers sell used books, CDs, DVDs, and other products alongside new items. As of October 2014, Amazon Marketplace is the largest of its kind, followed by similar marketplaces from Sears, Rakuten and Newegg.