Read the article to find out why, but it sounds like Tony made the right decision:
Zappos continues to operate independently. Our relationship is governed by a document that formally recognizes the uniqueness of Zappos's culture and Amazon's duty to protect it. We think of Amazon as a giant consulting company that we can hire if we want — for instance, if we need help redesigning our warehouse systems.
In the first quarter of 2010, net sales at Zappos were up almost 50 percent, and we've added several hundred new employees.