EDIT:
So according to this thread, this is a Google related change and not Nvidia?
In which case, similar to the banner issue from a previous update, you can get a different launcher (see comments for FLauncher) to avoid it
https://www.reddit.com/r/ShieldAndroidTV/comments/181vh4t/ads_at_full_screen/
Interesting… I have an OG Shield, also in the Netherlands, but have seen no ads (that being said, companies A/B test and do gradual rollout of this kind of BS).
But I also kept my Android Home in the version without ads by disabling Play Store updates and instead manually going over all apps (except Home!) every month or so (or when I have an issue with any app I use).
I feel confident that I’ll be able to hack my way around this new form of ads.
Yeah, not updating the home launcher is usually the fix for all these annoyances, until the oldest version of it that you can rollback has ads though.