Thank you for the update.
It appears that you are using the Pro version of MagicSpam.
You are correct that, in the MagicSpam Pro version, the MagicSpam interface and settings are also available to your customers. Your customers are able to enable anti-spam rules that are not already enabled by you in the main root/Administrator level's MagicSpam interface settings.
Please let us know if you have any other questions.
-- MagicSpam Support Team --