You'd be surprised, "scaling" a database is something that more and more folks are having to do lately, with the onslaught of mobile apps and facebook apps and web apps, it's just a whole lot easier to create an application that gets hundreds of thousands of users - millions of users.
And more importantly, you can have an application that has hundreds of thousands of users and not really make a ton of money, so you kinda need something that is easy to use because you don't have the capital
And more importantly, you can have an application that has hundreds of thousands of users and not really make a ton of money, so you kinda need something that is easy to use because you don't have the capital