As we do community organizing, we want to know WHO has been invited to an event, not just whether they are coming. We would also like to know if they CANNOT come--ie that they've turned DOWN an invitation. Events to which you can respond "MAYBE" (or like Facebook, "interested") would help us identify who we should reach out to again. And helps to show people's engagement even if their schedule cannot permit their attendance to a specific event.
This is something we will consider but does not have a timeline at the moment - I also wanted to add the information from an older suggestion, RSVP yes or no, to this one.
We are paying close attention to the most popular suggestions so please share and encourage others to follow and comment!