I've noticed that there's been a proliferation of 'intelligent conversation' sites like Big Think. Why is this?

Are people not getting the stimulation they need within their immediate physical communities? How engaging do users find this kind of conversation site?

Is it providing meaningful conversation where there was none? Is it a supplementary source for ideas and trends? Is it easier to talk with people online than with people in our daily lives?

Is it really generating the kind of 'thinking' and 'conversing' that the creators had envisioned it would?

What role does a site like Big Think play in your life?