Flurry iOS analytics: "the sale of virtual goods is overtaking advertising" (opens in new tab)

It will be interesting to see how virtual currencies evolve and compete with more traditional economies. There's an interesting Q&A on Quora about Facebook emerging as a global currency: http://www.quora.com/Does-Facebook-Credits-have-the-chance-t...

This is one of those "I'm not like most people" moments. I find advertising SO much less annoying than paying for nothing. If you had asked me if this model would have caught on a few years ago, I'd have laughed at you. Shows what I know!

Is the real dynamic here one of peer-pressured purchases? Or is it more subtle than that?