What if a user wants to be notified for all events but category(ies) are added after they register?
There are two easy solutions for this. • When you add an event add it to all related categories, this will ensure that users who sign up for some categories and not others are more likely to receive the event in their newsletter and will increase the events exposure. • Include in your event newsletter template an announcement about new categories being added and including the [editregistration] variable so users can return to your site and add any new categories they may be interested in to their registration.