Something has gone off the rails with the invitations to the External Facing groups -- as I think @JimWoodhead has probably realized.
For example in the * MAS90 Routine I have 20 outstanding invitations.
No way that 20 people just ""missed"" the invite
Jim did you get any type of plausible denial from Socialcast that this wasn't a bug? Seems to me that there is some type of serious bug/problem with adding in members.
Either the emails for 20 people all went to SPAM and/or BlackHole filters or Socialcast has some other bug (more likely)