Conference Joy is a different take on conference management. Typically, conference guests fill out forms, pay a fee, and give it to the conference admin. That's it. If something changes, it's up to the conference admin or conference guest to find one another and talk about things.
Conference Joy uses your email address to help facilitate that communication. Conference admin can notify you immediately of any important announcements like changes in pricing, where the conference site will be, or even how to get the group picture that was taken yesterday afternoon.
Conference Joy will not use your email for any other purpose without your permission.