Kind of off topic but:<p>At what point can a companies growth slow down without it being a concern? For example, google says as of March 2015 Facebook had 1.44 billion monthly active users. With an estimated 3 billion people in the world having internet access that&#x27;s 50%. Can you really expect to see significant growth at that point?<p>One other thing I&#x27;ve never quite understood is the concern with users vs. revenue. I get that for a start up, you want to grow and grow fast. For an established company like Twitter, as long as your user base isn&#x27;t actively shrinking, wouldn&#x27;t it make more sense to concern yourself with making money off those users instead of trying to gain more? What would be a better sign, 1% user growth but 15% revenue growth, or 1% revenue and 15% user?