And it's clips like that that make me understand, at last, why Dick Clark saluted the camera and left the stage at the end of Pyramid!
I think Dick Clark left the stage to be able to have more time to change outfits and get makeup touched up. I read somewhere that Clark taped 10-15 episodes of Pyramid at one time, so the most courteous thing to do would be to allow him a little extra time. Davidson left the stage too, probably for the sake of consistency. The ONLY time Dick did NOT leave during the credits was the final ep. of $20k Pyramid. I don't recall if he exited during the 25k Pyramid and 100k Pyramid finales (did 100k Pyramid HAVE a "final ep?")
When Louie Anderson first did Feud, he did stick around during the end credits, but apparently he told the producers he felt uncomfy sticking around and trying to blend in with everyone else clapping along and dancing with the theme music. So they let him leave the stage at the end, and this gave him more time to change, and smoke. Karn, on the other hand, always stuck around. It was interesting to see John still cracking jokes as the credits rolled.