The cost per license for hosted app is also almost 0, but what about those webapps that consume space - e.g. say a Dropbox or Basecamp - that actually gives sto

The cost per license for hosted app is also almost 0, but what about those webapps that consume space - e.g. say a Dropbox or Basecamp - that actually gives storage. Then surely it's not 0. If it is something like an accounting app, then sure....but I am talking about apps that will incur a cost per each new user.