I read about that Mr Red. Absolutely terrifying to have evil cackling in the middle of the night coming from the Alexa. I'd have freaked out completely!
Have to say though that we get quite a few things on Amazon. Their secondhand books are great, and their prices are very competitive. It's the only place I can buy Vim (scouring powder) and Algoflash (plant food) We buy something nearly every month. But I don't have the Prime arrangement. You're quite correct, they DO make it difficult to navigate a sale without inadvertently 'signing up' for that.