Advertisers are keen for their ads to be seen, that goes without saying. But it's more important to be seen by the right people, hence the explosion in targeted advertising. Social media is a great way to gather massive amounts of data about people and deliver ads accordingly, but some mobile games take things further.
You might find it hard to believe that a company would be quite so blatant about activity that many people would find abhorrent -- if they were aware of it -- but it is detailed in the policy, along with details of how to opt out:
Choice for Device Microphone Data: If you use a mobile application that includes the Service, you can also provide consent for us to access your microphone to collect and use data about the video content you watch on your television or other video viewing device to customize advertising in mobile apps, as well as provide you with television content recommendations. To withdraw that consent, you can use the platform settings of your device as shown in our mobile opt out guide, available here. You could also withdraw consent at any time from the settings menu of your mobile app.
While Alphonso says that only TV audio is recorded, not human speech, and that data is never knowingly collected from those under 13 years old, the revelation will come as a surprise -- and a disturbing one at that -- to many people.