Yes, you may invite others to join you on WizIQ. Not mandatory to have them on WizIQ to add them as your contacts. To invite your contacts,

1.    In contacts, go to Invite and Import.

2.    Enter the email addresses of your contacts or import them from your webmail accounts.

3.    An invitation is sent to all the invitees. When they join WizIQ through your invitation, they automatically get added to your contacts.