Purely a matter of scarcity. Back then people had a real need to know what other people think about things. Then they found out, then they found out more than t

Purely a matter of scarcity. Back then people had a real need to know what other people think about things. Then they found out, then they found out more than they should, then they no longer needed to know, then they realized they couldn't stop the torrent so they jumped in to purely vent.