We do  set limits on the disk space and bandwidth (data transfer) that we provide in plans that are marked "Unlimited". This is for security reasons. You can contact us at any time and we will increase your quota/bandwidth for free. We want you to have the resources available to you to build a great online presence.
Even though we want you to succeed, we need to ensure that we're providing all of our customers with optimum service. As such we do require all of our customers to be fully compliant with our Excessive Resource User Policy/Terms of Service and utilize disk space and bandwidth related to normal operation of a personal or small business web site.