[orasis]

social networks can't be launched broadly. Unless you can niche down to a space where you get very high penetration, this thing is DOA.

[phreeza]

That is an interesting hypothesis. Certainly true for facebook, but as far as I know not true for the new breed of social networks like snapchat and tinder? Though one could argue they are focussed on narrower demographics as opposed to geographically constrained locations.