Social networks & friends

If we look just a couple of years down the road, there is no question that Facebook’s U.S. uniques will have peaked. Not for any flaw in the company’s model, but for the success of it – everyone will have signed up – so their growth rates will be checked by the population. At that point, churn will grow, as users discover other niche social networks, just as the broadcast television audience fragmented across so many different cable stations

via Building A Social Network In A Facebook And Twitter World | paidContent.