Most people have never heard of Reddit. Facebook is a global community that everyone has heard of. And, trust me, while people like you and I might hang out o

Most people have never heard of Reddit. Facebook is a global community that everyone has heard of. And, trust me, while people like you and I might hang out on HN/Reddit - most of the rest of the planet spends so much time on Facebook that they don't even use email any more. Conferencing, chatting, socializing is all done on FB.