The key is to build a user base from whatever easy/free traffic source exists at the time you need to do it. May be it was Google may be Facebook, or even the A

The key is to build a user base from whatever easy/free traffic source exists at the time you need to do it. May be it was Google may be Facebook, or even the App store (just wait for the big paid promo squeeze on that one.) We've had it easy for a decade. User growth from people who just weren't online before. Ad revenue growth from dollars that fled traditional media. When those growth engines end, and easy/free traffic engines slow down, the content business is going to be fucking painful. To some extent, it already is.