Google has recently made their Google Earth Pro License Key free. They did not say why they did it but it is another step in bringing geographic analysis down to the level that encourages everyone to use, experiment, develop, and grow the technology across many applications. You just have to sign up, you can install the key and download the program. It used to be priced at $400/year.
As remote sensed and GIS data continue to be more widely captured and used, Google has set themselves up as a initial software viewer of choice for many people, as other solutions can be priced above some application entrepreneurs’ budgets.