Being a geeky kind of guy, I signed up for the free USPS 'Informed Delivery' service. This service is a digital preview your mail and your packages that the USPS sends you each morning. The email contains greyscale (typically) images of the exterior, address side of letter-sized mail pieces and track packages. These images were automatically being harvested by the USPS scanning equipment so emailing the images to postal customers every morning is not a stretch for them.
One of the interesting things I have seen done with this service is identifying a 'marker monkey' since it was easy to show the postal inspector that the envelope was unmarked when it was scanned but landed in the mailbox with Sharpie marks. This allowed them to ID the culprit since only 1-2 humans handled the package during that time frame.
It also helps when discussing with the local postmaster non-delivery issues...a bit hard to deny that the mailman isn't slacking with 'Informed Delivery' evidence in hand.
But in the last week or two I also noticed something new in the emails…spam. USPS has figured out that if companies are willing to spend money printing and mailing junk mail, they might also be willing to pay for a live link in the 'Informed Delivery' email. So sure enough there are now including links with some of the junk mail as shown below. Note "Learn More" and note that this image is in color, this was a full color image of the actual junk mail we received.
Kudo to USPS for figuring out this profit center in the digital age. (I think!?!)