I have Rokus behind a PiHole. They generate a lot of traffic. I think the majority of it is telemetry, as opposed to requests for ads. That being said, I think Roku behind PiHole is about perfect. There are no ads, and its search will let you search for a show and it will tell you which service it's on. I prefer its spartan interface to one that's busy, or has a grid. I rarely channel surf. When I watch TV it's deliberate. A grid does me no good.