About (1): you know that USPS literally has a monopoly and several legal advantages? About (2): duh, yes, because they ain't stupid. For an analogy: if there'

About (1): you know that USPS literally has a monopoly and several legal advantages? About (2): duh, yes, because they ain't stupid. For an analogy: if there's free municipal water, Coca-Cola would make use of that for bottling, too. Or if there were subsidised electricity available etc.