Roku watches what you are watching and shares that data with their trusted partners. Same as Android TV (whatever it's called now) and Amazon Fire.
AFAIK, the only mainstream streaming device that doesn't do this is Apple TV.
AFAIK, the only mainstream streaming device that doesn't do this is Apple TV.
In the end I bought a broken Samsung 32" 1080p mostly dumb TV on ebay for £0.99, fixed it (power supply capacitor problem) and steal all my content and ship it on USB sticks to the TV which will quite happily play h264 / mp3 encoded stuff.
Fuck the whole industry.