[Stenerson]

I agree - It's not that people aren't using Facebook mobile, it's that they can't monetize Facebook mobile. I'm not sure how buying Instagram fixes that.

[malandrew]

I would say that Instagram buys Facebook time to solve the mobile revenue problem by extending their virtual lock-in on user's photos.

[unreal37]

I think they can monetize Instagram easier than they can monetize Facebook Mobile.

[tyree732]

How? If Instagram charges for anything or adds ads to their interface people will shift to different photo sharing service, plain and simple.