PM if you still need an invite. I will try to get you in
I wouldn't say they are getting slammed about it. It is just ignorant people that don't know how to rate apps. It happens with all apps. If something is not to their liking it becomes a 1 star. How can you rate an app if you have not even used it? I think Google+ will be just fine. They just had to close the invites down the other day because they had too many people joining.