"They have had the courage that almost no other public company has had the courage to, basically, resist the drumbeat of short-term, quarterly earnings that have had us trapped here for a couple of years, as our same-store sales came down," Mackey said of Amazon. Foursquare's Crowley said he's now left wondering what commerce company or technology Amazon will buy next. Some analysts think Amazon might take Macy's ( M ) out of its misery for about $10 billion in order to utilize its physical stores as part of its distribution network, similar to the way it's expected to use Whole Foods' stores. Visit here for the latest business headlines.