I think we're too hung up on the number. It has nothing to do, really, with the dollar amount of the company - that's just a proxy for impact/scale. I could as easily say "Be President" or any other things that are at that scale.
Doesn't scale as an individual. So your impact is basically limited by how much time you put in for each. On the other hand if you are trying to build Khan Academy or Udacity with that purpose, that would match my point of doing great things at scale.
