I keep count sometimes. I ran a minecraft server for 23 months
  that I stopped back in Sept '14. Started it for my nephew when
  he was 7. When all was done, 27,000 unique people. I gave them a
  space to create their own world. I responded to problems with
  mean-girls, bullies, various forms of misconduct but mostly,
  just provided a safe space online. It was just for my nephew but
  it got pretty good. I saved the world - it's here on my HD - and
  someday I'll figure out a way to separate their creations and
  they can have them, if they find me (and I'm easy to find
  online) so they never lose the hard work they did.