"Generally speaking, there are two ways (and only two ways) to scale a business to hit that $100 million threshold."<p>Actually, there's another way to hit >= $100M.<p>Be a strategic acquisition target. (Route two: The viral effect can overlap with this.)<p>I forget who blogged this (Dixon?), but the idea is that that to hit a >= $100M valuation, you should not be thinking of the standalone value of your business, but instead the value it provides to potential acquirers.<p>Sitting on crucial patents is one approach, but extraordinarily tricky.<p>More importantly, if your existence presents a strategic challenge to a larger player (e.g. Instagram), then your business is worth a lot of money.