The Amazon app on iOS has started playing a full screen video ad every time I navigate to the home page, and there doesn't seem to be a way to turn it off.
I've been cutting down my use of Amazon in general, and only using the app to search/quickly add stuff to my cart before buying through the smile.amazon.co.uk website if I don't find the same item locally, so it’s been the last push needed to get me to delete the app entirely. So I guess it's “well done, Amazon” in that regard?