From the App.net State of the Union:
As many are aware, the first major round of subscription renewals from the original App.net launch happened a few weeks ago. We have been anxiously anticipating what our subscription renewal rate would be in order to do budgetary planning. Since we have not been sure what to expect the renewal rate to be, we mentally prepared ourselves for a wide variety of outcomes. The good news is that the renewal rate was high enough for App.net to be profitable and self-sustaining on a forward basis. Operational and hosting costs are sufficiently covered by revenue for us to feel confident in the continued viability of the service. No one should notice any change in the way the App.net API/service operates. To repeat, App.net will continue to operate normally on an indefinite basis.