(It seems like you DO keep them until the end of the trial, but you only get told that after cancelling)
Together with their decreased support quality (agents barely understanding what I write + the typical "tell the customer what they want to hear so they go away and give you a good CSAT, by the time they realize you lied it won't matter for you anymore"), I have a _very_ low opinion of Amazon. They still have a service (delivery time), price (free shipping) and consistency advantage in many cases, but it's quickly shrinking, and I am much more likely to buy from alternative places if they can make a competitive offer.