Nope! I can turn of personalised ads. But the homescreen is filled with recommended apps, recommended shows, popups about added subscription functionality, or straight up banner ads if it feels like it.

Samsung the frame 65" for $2000 constantly pesters about $15 monthly subscription to change the art on the display to their selection of public domain historical artworks. Otherwise you're stuck with the default slideshow, which you're now forced to see since the whole sales pitch of the display is showing art when turned off.

atleast they had the decency to not show ads as default art instead... but i wouldn't put it past them

You could, but it won't do the job.