Amazon's code is not secret internally. If Alexa was targeting ads on your speech, someone from Amazon present or past would have confirmed it by now.
Or not? How many people have access to Alexa source code, let alone that part of Alexa source code, and are also willing to break their NDAs and get fired and/or sued?
Or not? How many people have access to Alexa source code, let alone that part of Alexa source code, and are also willing to break their NDAs and get fired and/or sued?