[ruthvik947]

I think it is ridiculous to think that Facebook is sharing data to 3rd party sources out of charity. If you provide more value via data to integrating applications than any of your competitors, you will continue to have the largest share of the market. So yes, there is profit incentive.

[nickysielicki]

Many people find various apps on Facebook to be useful. That makes Facebook a better platform which makes Facebook more valuable. Of course there's the profit that comes with making their product better. Heavens forbid!