It's interesting how you interpret that. My interpretation is that Alexa listens to everything, and only responds to it's name. Which is different than saying that it's otherwise asleep. In fact, you have no way to tell what it listens to, what it hears, and only the vague promises of a EULA that you've probably never read that it will "do no harm". And yet we have documented examples of Alexa listening when it wasn't supposed to, and sharing what it heard.