I feel quite comfortable saying that there has been zero value to myself, or any other human, in delivering marketing mail to my home. I never look at it, I never read it, it just goes straight into my recycling as soon as I identify that a letter I've received is not from someone I have a legitimate personal or business relationship with. I have never made any purchase as a result of receiving an advertisement delivered to my home by USPS.
This is to say-- there have been changes made to the delivery frequency historically and there will be again most likely.
I like the USPS, but there is something odd about taking a piece of mail and dumping it directly into the shredder. You'd be surprised how many junk-mails contain a thick plastic card that can't be shredded-- I assume its to force you to open it.
It has gotten to the point with all of my communication technologies-- I dread phone calls, I dread text and instant messages. I dread mail of any type-- it's always bad news.
Perhaps I should have clearly stated it in my message.
The fact that this is a "$16bn effort" doesn't make it useful.
Also consider that if this is a "$16bn effort" the loss is multiple of that. Think of the advertisers (and their clients money), the effort to discard/recycle this garbage etc.
The loss for humanity is greater than $16bn.
Is this 'type of business' is to be eliminated, then USPS will drop the respective fraction of their use-less resources (staff, trucks, sorting machines, etc.).