The fact that I can invite someone and then they can't get in is ridiculous.

Do you think that person is going to try to get in again later? Probably not. And with only a handful of my invites getting in, my feed might as well be twitter with a lot of big public figures I followed. There's nothing personal there.

It's a stupid way to launch a social service. Social is nothing without my network. So far I have to rate google as still not getting social.