making big money....strange

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almost everyone of us here has an account on either facebook or twitter,what do we do just have fun or maybe just pass our time thats it.a survey has revealed that social networking sites such as facebook and twitter are costing british businesses 1.38 billion pounds a year that is equal to 10,000 crore rupees.how strange it sounds that around the world people are just passing their time on such sites and these sites make big money out of it. please say what u guyz have to say about it..