https://www.cnet.com/news/amazon-key-took-over-my-door-for-3-months-it-wasnt-as-creepy-as-i-expected/

Amazon Key is an in-home delivery service offered to Prime subscribers in select cities. Purchase the Amazon Key Home Kit, which includes a smart lock and an Amazon Cloud Cam security camera to use the service, which enables an Amazon-contracted "delivery provider" to unlock your front door and drop off Amazon packages inside your home. You get alerts through the Amazon Key app about upcoming deliveries and you can watch the delivery in real-time straight from your phone. Amazon also records and saves video clips of each delivery for your review. 

As in-home delivery services become more ubiquitous, especially with large companies like Amazon, balancing privacy concerns and convenience will become increasingly important. Ultimately, it's up to you to decide if you're more concerned about package theft or subscribing to Amazon in-home delivery.