[timgilbert]

You can either have it display from a Google Photos photo album, and get the version of the interface which constantly displays ads to you, or you can switch the interface to "apps only" mode which will only show you one big ad on the home screen. In "apps only" mode, the thing won't display your photos, either as a screensaver or anything else. You still need to be logged into your Google account, of course; as far as I can tell, not displaying photos is just a way of punishing you for trying to reduce the ads you see.

[dzikimarian]

Is there different version for EU? I see either list of apps and bunch of shows from streamings that I have (home view) or just basically play store, with installed apps on top.

None contains ads. If I leave it alone it will switch to Screensaver in a few minutes. Photos in my case. Bit sad they have hidden 3rd party screens savers, which were better, but there definitely isn't anything I can call "constant ads".

[fivestones]

You can still get third party screen savers if you use adb