Unless you've come up with some new unknown method of inviting people and having them join, you are scamming a lot of people out of some bitcoins.
1. Sending the share to someone without gives them the email, but I think they only distribute them so many at a time.
2. You receive the email, and get notified about looking at the share (whatever it is you commented on, etc) and click the link.
3. They get sent to a page that says they are over capacity and a button to keep you notifed.
AFAIK there are no more invites being allowed, so I'd be weary.
Your quite wrong 1. im not scamming anyone hence the "free" bit im only accepting bitcoins cause i need to save up for a ip.board license and 2. i just invited my mom to google+ five minutes ago so learn your facts buddy.
EDIT: invited you guys
http://plus.google.com sign in
