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![](https://fry.gs/pictrs/image/c6832070-8625-4688-b9e5-5d519541e092.png)
The ads are added in the app. If you cast, the Chromecast can’t add apps (yet) so they’d have to make ad streams instead, and switch between the streams show-ad-show which would take several seconds of loading screen each way and so on. Which is a level of fuckery even they shied away from.
TLDR they can’t (easily) show ads during casting.
desec.io