90% of all customers will be served by using the basic offering of Awesome Antispam, however power users and larger organizations may want the additional reporting, self service features and customization available in the Premium offering. You are able to upgrade to the Premium offering at any time.
Content retrieved from: https://support.appliedi.net/kb/a958/can-i-move-between-the-awesome-antispam-basic-and-premium-offerings.aspx.