Imagine if the progenitors of email thought to require e-stamps, say a thousand emails for a buck. There's a parallel universe where 'Email co.' is a major tech player comparable to Google. Not sure it's a better universe, but bears consideration.
Same, but I realize that nearly everyone I correspond with uses Gmail, so Google has all my emails regardless. (Ok, they don't get my transactional email, since those are usually sent through something like Sendgrid, but... yeah.)