If they make a small fortune from this, it'll be because the having the pro account brings a lot more than $99 to the designer; i.e. because of the value of the

If they make a small fortune from this, it'll be because the having the pro account brings a lot more than $99 to the designer; i.e. because of the value of the service provided, not the cost of signing up. Because if the service doesn't bring the value, nobody is going to continue to pay for it in the long run.