H.E.L.P.eR., Dr. Girlfriend, Dr. Orpheus, and Henchmen 21 and 24 are absent from the first season intro. Dr. Orpheus and H.E.L.P.eR. appear in a season 2 gag intro. Dr. Girlfriend, 21, and 24 appear in a season 3 gag intro.
I dunno. I think they're a horrible waste of money, but I feel that way about most aspects of "Geek culture" and I don't think they should be banned anymore than we should ban anime body pillows or day one DLC.