Sammy Davis, Andy Williams, Tony Bennett... their records sell in the millions; when I do it, it just trickles. But for the composer and lyricist, there's a tidy bit to be made that way, too, so I don't really mind.
I've enjoyed appearing in Atlantic City. East Coast audiences are a bit brighter than Las Vegas audiences. I think most entertainers will tell you the same thing. The East Coast audiences are more perceptive - especially when it comes to a performer with a theatrical background.