[dolinsky]

pre-revenue stream

  Here's a shiny black box that can potentially solve all the worlds problems......
  Our growth is tremendous, so get in now while the escalator flies to the moon!

turn on revenue stream and the revenue plateaus at a negative cash-flow position

  Here's a shiny black box that ain't makin' us money. Who wants to buy it?

It's not too difficult to understand why a company with tremendous (most of us here would say overhyped) growth is afraid of generating revenue that doesn't come close to matching the hype (I mean growth).