I've got this large delivery box on my porch. Right next to the door. You see it when coming up the steps. About 1/3 of the time packages are left on the porch next to the box that has inch-high letters spelling "Deliveries". The page on Amazon for "delivery instructions" changes frequently, but there's no way to put on there anything about "delivery box". At least they now come to the correct door of the house - there's a place for that.
Amazon's problem is that they outsource the delivery and there is such a terrible turn-over problem with delivery drivers (and delivery contracting companies) that nothing works at their scale.
Circa 2010-2014ish, I had the same Amazon delivery driver for several years, and it was awesome! It was just this one guy who delivered all the Amazon packages to my neighborhood. Same guy in the same truck every time, and he got to know my family and we would chat and he would help me with gardening and give me advice on how to prune my trees.
Amazon's problem is that they outsource the delivery and there is such a terrible turn-over problem with delivery drivers (and delivery contracting companies) that nothing works at their scale.