> Amazon likely loses lots of money by shipping heavy food items to Bush Alaska, Probably not. U.S. Mail to Bush Alaska is heavily subsidized, through a program called "bypass mail". In the past some people have seriously abused this program (e.g. mailing enough concrete blocks to construct an entire building).
Found an old associated press article about that: >Sam Krogstad of Bush Consolidators, which specializes in sending construction materials via the mail, says the Postal Service’s losses are partly self-inflicted because the postal system pays 10 times as much to send the building materials by air freight as it charges Krogstad to mail them. https://apnews.com/article/281d3e682569b2cc5edd890bf600d17e
Making a profit is not the point. Ensuring that every citizen has access to the communication network as a right is why the USPS does this