I think we've come far enough to realize that there are many business models to the concept of software being delivered in a browser as a service. The original

I think we've come far enough to realize that there are many business models to the concept of software being delivered in a browser as a service. The original model was companies paying a monthly fee for a subscription. Now we have many different types of models. The point is that FB makes an application for consumers and businesses. It is delivered as a service through a browser.