Email support is only available to Premium/Professional accounts but Forum support is open to all users. That's why we encourage free users to use JotForm Support Forum. I think free users should also help other users on the forum so that JotForm Team can focus on improving JotForm and keep providing the same good service.
Priority on bug fixes depends on number of users who are affected by a bug. If it is an important problem we give it high priority. Only exception is the payment integration bugs. Many people become Premium because they make payment forms. Also, they involve money exchanging hands. That's why payment integration related bugs always take high priority.
The lowest priority items are the feature suggestions. At this point we are trying to make sure JotForm 3.0 rock solid. So, we keep fixing bugs and leave the feature suggestions for later unless it is asked by too many people.