Yeah, there's no question that buying Skype was a terrible move and not just in hindsight (lots of people at the time were saying that it didn't make sense). But if you compare eBay to Amazon (which the author tries to do), the eBay share price dramatically outperformed Amazon during her tenure and just as dramatically underperformed after she left (but to be fair, the recent performance was also due to the fallout from Skype and to her failure to evolve the eBay business model)