Could have made that point more clearly I guess. Zynga, Airbnb, Dropbox and OMGPop all have massive revenue growth. Instagram could have easily had massive revenue, they just--wisely it seems--decided to make filters free. Hipstamatic charged for filters, had a fraction of the user base and never hit real scale. If Hipstamatic makes $5,000 a day / $2M a year (which it might), then they made $2M a year on tens of thousands of users vs. Instagram's $0.00 a year on tens of millions of users.

Of course the best thing to have is tens of millions of users and revenue (Zynga, OMGPOP).