But these auctions were relatively rare and governments often asked that the spectrum be put to a specific use, such as serving rural areas, rather than just to lighten the load on the busiest parts of a network.

BBC: Turtle road sign

Some text providers operate in specific towns, counties or regions and-or rely on trained teen volunteers to handle the load across modes of communication.

NPR: Crisis Hotlines Turning To Text To Reach Teens

For every route, airlines load a dozen or more different fares into reservation systems and then pick which one applies to a specific flight at a specific time, usually based on how well that flight is selling and what the airline expects in demand for seats, including demand from business travelers who book later.

WSJ: Finding the Best Fares to Europe