I am seeing the same thing with USPS lately. I lean in the direction of thinking that Amazon has negotiated a deal with the USPS such that Amazon is now such a big part of what USPS does, the "normal" USPS tasks and responsibilities are taking a backseat to Amazon.
Is anyone else getting the feeling that Amazon is going to turn into "America's retailer" in such a large way that there will be very few, if any alternative purchasing options available ? For those that would say "we're already there", I would disagree (at this point in time). But, I get the feeling we are well on our way to it.