I will pay $5/Month to make sure that I don't get any junk physical mail in my mailbox (US). I hate sorting through mails and I almost always know that 95% are junk.
I wonder, if it would make sense, to have a service, which would receive all your mail, sorts it for you, throws out the junk, scans the rest and email that to you. In Norway, I rarely receive any important physical mail, especially since the government has started a secure email service[0], where you can receive your payslip and other important documents from government departments. The senders are pre authorized and pay a small fee to send an email to the user but the service is free for the user of the service.