Bing Wallpaper app now shows full-screen ads, and users are furious

Bing Wallpaper showing Ad for Harry Potter and Fantastic beasts box set

A long-time Bing Wallpaper user reports that the app has started displaying a full-screen ad for a Harry Potter and Fantastic Beasts box set, replacing the wallpaper. The user describes it as 'atrocious UX' and momentarily thought they had installed adware. Another user agrees and suggests sending feedback and uninstalling the app.