Anyone ever counted how many "facebook killers" are out there? Tsu.co is the last one I heard of.
And what about Diaspora, if we are talking about decentralized social networks? Didn't work out either. The name sucked anyway.
The problem all this "faceook killers" have is the same problem sodas have that are trying to compete with Coca-Cola. Or operating systems that are trying to compete with existing ones. Or
well you get the gist. But it's ten times worse, because the main premise of social networks is, that they need to be popular; that is their function.
It's like trying to sell a telephone book, but you are missing half of the numbers, or selling a map, but you are missing half the street names. Even if you would try to sell it at 1/3 the price and it is printed on real nice paper, nobody would buy it.
This make no sense, it can be deducted from "that they need to be popular" that facebook, twitter, instagram, etc started with userbase of millions and not a few people? this is completly wrong, you need to gain popularity thanks to diversification in this market.