Vizio tracks set top devices like the Apple TV as well. They do this through Inscape.tv - which basically tracks a pixel in the corner to fingerprint what you a

Vizio tracks set top devices like the Apple TV as well. They do this through Inscape.tv - which basically tracks a pixel in the corner to fingerprint what you are watching, they record this real time along with your location, wifi info, etc. and create advertising audiences or sell the data in "anonymized" form. This is always running whether you're using an app, watching antenna TV, or using a third party device. The only way to prevent it is DNS blocking with something like the pihole. And that's if they allow you to change the DNS lookup address.