Social Network Contacts = New Currency

I was going through my FB feed today and noticed one of my buddies had installed the "My Files" application from Box.net. I thought it looked interesting so I installed it as well. Then I got the following image:
I got 60 MB in additional storage since 3 of my buddies had installed the app. I could "spam" my buddies and hopefully get them to install the app so I could get more storage, but I was pretty sure that would piss some of them off.

Is this the future of software? The more # of users you have = the more eyeballs = the more potential to make money off of advertising.