After its disappointing IPO last month cast doubts on the company’s ability to monetize its vast user base, Facebook today announced a subsciption pricing model - potentially adding a recurring source of revenue for itself - and for developers of Facebook apps. The new service, announced on Facebook’s Developer Blog this afternoon, will launch in July. Subscriptions will bring Facebook app producers a recurring revenue stream that will ideally normalize an app’s overall revenue stream, instead of depending on the spiky ups and downs of one-time payments for virtual items.