On email and the first instance of spam: This is not for advertising! This is for serious work!
We never, ever in the history of mankind have had access to so much information so quickly and so easily.
We live in a very complex world.
People's motivations haven't changed in maybe 400 or maybe 4,000 years.
Privacy may actually be an anomaly.
I can imagine people actually working in virtual environments where productive, cooperative work is undertaken, and I think we will find people helping others to take advantage of masses of information that are inaccessible or too vast to process in real time today.