If you plan on installing Spore
on a few PCs and want to be able to use one of your authorizations by de-authorizing another, EA has provided a tool
for you to do so. You don't even have to uninstall the copy from a PC that you are de-authorizing to do this. It probably doesn't make up for the DRM that's still embedded into the game but it's something to help those that want to do multiple installations in their house.