I love watching geeks ranting at eachother about the relevance and value of their shitty internet start-up, having failed to grasp the fundamental point:
A product or service is only worth what people are willing to pay for it, fucker.
How is Facebook valued at billions of dollars? If it disappeared tomorrow, would anyone give a shit by Christmas Day? Not fucking likely. Would the world suffer if Twitter were to disappear up its own anus? Pah.
There are three essential jobs - farmer, builder and water-carrier. Everything else is just a different shade of bullshit.
End of story.