I've been using the service for a couple months (got in on one of the first waves of beta invites). AFAIK, there is no sharing invites to others. I can't see an

I've been using the service for a couple months (got in on one of the first waves of beta invites). AFAIK, there is no sharing invites to others. I can't see anywhere where I can do something like that. I think you just have to wait until DDG sends out more invites themselves.