After August 13, how much can the business model of App.net change? Is it possible that a free-tier could be added that allows the average user to access and u

After August 13, how much can the business model of App.net change? Is it possible that a free-tier could be added that allows the average user to access and use the service without paying? Additional developer & other features would be available to those who pay for them. In determining a business model for App.net, it seems they've never addressed why there isn't a free tier.