Earlier quoted context omitted.
That was an obvious hyperbole. The point is: 50,000 or even 100,000 users =! success, and you don't necessarily need users to make money (although it helps!).
The grow-users-before-revenue strategy has several spectacular success stories: Google, YouTube, Facebook, Flickr, MySpace, etc. etc. That's not to say it's the only valid strategy, but it's certainly a valid strategy. In fact, it probably has the highest payoff, albeit with the highest variance.
-Youtube might have been fucked if it didn't get acquired. It was hemorrhaging cash like Pac Man Jones & Robert Downey Jr. trapped in a strip club.
-Flickr was _priced_ like a talent acquisition.
-Like most acquisitions, the Myspace acquisition has largely failed according to Google, their primary advertiser. Additionally, Myspace's contribution to News Corp's earnings have been piss poor.
I agree that it's a valid strategy (especially for a company like Justin.TV), but IMHO opinion most companies have tunnel vision when it comes to turning in to a real business. It almost makes them risk seeking. Although getting acquired is nice, it sure as hell isn't a strategy - it's a cop out.
I'm trying to come up with companies that tried this strategy and either worked (issued dividends continuously) or was acquired and actually benefited (i.e. was worth their acquisition price based on DCF) their acquiring company. I'm sure there are examples, I just can't think of any off the top of my head.