What happens when you grow so fast that you start to saturate the population. This has happened to several Facebook app developers. They experience very rapid growth, and then suddenly the growth dies. Andrew Chen has written a great blog post about this: Facebook viral marketing: When and why do apps “jump the shark?”. (Side note: I don’t believe that the equation that Andrew puts forward for simple viral growth is correct, as it assumes that the entire population will continue sending out invitations at each viral cycle. However his work on saturation of the population is very relevant for highly successful viral apps.) In case you are interested in where the term “jump the shark” came from check this out: Wikipedia: Jumping the shark.
Blogging is still going to take work starting out. That path to $5,000 a month didn’t happen overnight but just like real estate development, it build up an asset that now creates constant cash flow whether I work or not. I get over 30,000 visitors a month from Google search rankings, rankings that will continue to send traffic even if I take a little time off.