Though, even with Special Offers disabled, it still puts oversized icons for marketing promotions, bursting out of the search bar at the top of the home screen. This is one of the reasons I find the home screen a little bit unpleasant to look at, and avoid it as much as possible.
[1] If you want to remove Special Offers from your own Kindle/Fire (I don't know about Echo Show), go to https://www.amazon.com/hz/mycd/digital-console/alldevices , click on the icon for your device, and scroll down, to find an option to disable Special Offers by paying some amount. IIRC, it said the amount was the difference between the original retail prices of with-ads and ads-free versions of the device. I've also heard some people can get Special Offers removed for free by customer service, but in my case it seemed like a fair deal, so I just paid the modest fee.