Heads up, online shoppers: Amazon’s $6 billion shipping deal with USPS is up in the air, and it could shake up how fast your Prime orders land on your doorstep. USPS is opening its delivery network to more retailers, which means Amazon might have to hustle and build out its own delivery army—or cozy up to other shippers. If you love one-day shipping, keep an eye on this postal plot twist! #Business #Industry #Amazon