Amazon probed by US Mail
Amazon will be just the first large mailer reviewed. Given the number of mailers who play fast and loose with the Media Mail classification, ANY mailer who sends large quantities of Media Mail packages is going to be checked.
I can remember, as a window clerk, having people claim Media Mail rates for such diverse things as toys, clothing, and even mag wheels. Many of the people were eBay sellers. The "mistakes" were discovered when the packages were examined later, which the USPS has the legal authority to do for anything mailed at Parcel Post or Media Mail rates. One person mailed more than two dozen boxes to himself in another city, where he was moving... not one of the boxes qualified as Media Mail, and he was required to pay the correct postage when he picked them up... several hundred dollars in additional postage.
Amazon might be as pure as new driven snow, but not every mailer is... Personally, I would prefer to see the Media Mail rate eliminated because of the cheating.
Paris, because she doesn't need to cheat the Postal Service