Sideloading is the Android TV feature you are not using.
Stop using your Android TV the default way.
If you factory reset your SuperBox or suddenly lose access to the App Store, you will quickly notice that Blue TV, Blue VOD, and the App Store itself are gone. These apps are not downloadable directly ...
The iTunes Store app will now direct users who wish to buy films or shows to Apple TV’s storefront. The iTunes Store app will now direct users who wish to buy films or shows to Apple TV’s storefront.