It has been noticed that Google wants to make their Google Pack free. And the most interesting part over here is that they are even paying people so that they get others to install it. That's something expected out of Google only. Looks like Google not only wants to make their Google Pack free, but now they are paying people to get others to install it.
From the adsense blogspot:
We're happy to announce that, in addition to AdSense, AdWords, and Firefox with Google Toolbar, you can now refer your users to Google Pack and Picasa. You'll earn up to $2 for each time a user installs Pack and up to $1 for each Picasa install.
Know more about the matter at adsense blogspot.