I've not had to sign for an Amazon package - or just about any other online retailer - in years. The only thing I've had to sign for in the recent past is my bitx40 hf radio kit, shipped from hfsignals.com out of India.
Amazon will cheerfully leave many hundred dollar packages on my porch. The other day, they sent a $16 toilet seat by UPS 2nd Day and I had to sign for that...
That’s UPS, and more specifically the UPS driver who made that delivery. Our neighborhood is very safe, but has apparently been flagged as a “don’t leave packages” zone in UPS’ system. Our regular drivers know to leave them, but whenever we get a sub or a fill-in around the holidays, we have to deal with trying to convince them to just drop it at the door.