I'll take this opportunity to tell a long-winded story about how that number can be two orders of magnitude larger, and still be too small.

I was with Slide when Google bought us in 2010. They bungled the acquisition (bought us to work on Google+, which had already made a bunch of disagreeable decisions by the time we were ready to rumble), so we were left to our own devices for a year, in which time about 12 of us made something called Photovine, a photo sharing app that would have competed with Instagram, and we were getting pretty universally positive press. I think TechCrunch called it the best mobile app google had ever produced, and all of our beta and early release engagement numbers were bananas.

(We also had loads of fun with it — the core sharing mechanic was organized around shared captions that we called vines, and we spent most of our play-testing time swapping visual puns.)

Anyway, if you project our trajectory generously, which didn't seem out of the question given our early traction, we would have wound up competing with Insta, doing business in the hundreds of millions. But Larry, in all his "more wood behind fewer arrows" wisdom, decided to axe the project, as he did many, many others, and re-assign all of us to YouTube, which, granted, was gearing up to compete with TV, and needed more staff.