Not so. The "standard" mail class, as advertsing mail is now called, is in effect heavily subsidized and does not pay its own way. The major mailers, unlike residential customers, pay lobbyists and make campaign contributions to congressmen and senators with oversight of Postal matters. Their interests are put above those of the general public when it comes to delivery rates. And the biggest reason that service from USPS has declined in recent times is the congressionally imposed mandate on the postal service to essentially transfer $5.5 billion from their income each year to the federal treasury, artificially lowering the deficit at the expense of postal customers.