Obviously to cash in on the success of the movie.
http://www.youtube.com/watch?v=m_2-aBzckZU
It's uncanny how they made up those actors to look just like Warren Beatty and Faye Dunaway, especially the former. From certain angles, I could've sworn it really was Beatty,
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Bonnie looks like Susan George, the cute and sexy Brit from Straw Dogs and Dirty Mary, Crazy Larry. This would have been just before her role in Twinky (aka London Affair, aka Lola), in the TITular role as a 16-year-old schoolgirl who has an affair with writer Charles Bronson, only about thrice as old as her. That's definitely Henry Beckman as the salesman, right before starting his role as the sea captain (named Clancy, methinks?) who brought all the brides to Seattle in Here Come the Brides. One of Clyde's men resembles Richard Dreyfuss, but I don't think it's him. Probably not George either, as she was still a fairly unknown UK actress at the time.
If you put me on ignore, then how can I notify you when I win the lottery?