I have no idea why anyone would pay extra for the ‘no ads’ version as they only appear on the Lock Screen which you only see when you switch it on and off. You just swipe once and they’re gone.
Be annoyed with yourself, not Amazon. Spend the extra next time
You don't think that amounts to greed, being made to pay extra not to have ads on a product that you bought, to read books that you also bought? We accept this st too readily