This idea has been merged into another idea. To comment or vote on this idea, please visit APP-I-4738 Admins should be able to add portal users as subscribers to ideas.
When creating an idea (in Aha, not an idea portal), the creator may already have one or more people in mind that are also interested in the idea, but who are not Aha users. At the moment a subscriber needs to explicitly go to the idea portal, review new ideas and then explicitly subscribe.
And next to adding on creation, adding afterwards from within Aha! would be handy too (i.e. if somebody creates a duplicate, we could add her/him to the idea that already exists.