As far as I can tell there isn't one. Even when you pay extra for no ads the interface itself is infested with them. A truly ad free amazon prime tier wouldn't constantly push shows and movies you that you have to pay for on top of the higher monthly fee you're already paying for or show ads for shows and movies on other platforms.

It is called: Prime Video Ad Free

Go to the Prime Video website, or check your settings in Prime Video on your device.

I have lived a video ad free life for decades. I am convinced video ads do bad things to our brains. In aggregate, beyond any individual impact they may or may not have.

Ad blockers, ad free YouTube, Kagi, … whatever it takes.

Two to five years ago. :P depending on how you feel about their cross-promotions (which are ads, but at least aren't inserted into the content)

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