That's just to pay the pickup guy. You have to pay for gas. And the costs of operating a batch scanning facility for mail. And most mail is not of uniform size and does not have uniform contents, so you end up having to manually open and scan the items.
It's totally unreasonable. The only place it makes even a hint of sense to do this is at the Post Office, before it goes to the actual customer. The customer could then choose scan, shred or deliver.
Maybe I'm just not clever enough to get it. But this just seems ludicrous to me.