Hi,
Nice app, but inviting only by email is very limited. This involves that the inviter knows the email address of the invitee, and that is not so good.
A more flexible idea would be allowing the invitee to fill the inviter's name in registration form. This way, new members can be invited via flyers, facebook messages, etc
Members who want to recruit new members can receive 20 invitations for example, if they use all invitaions, they receive premium membership or something
Can be done?