Doonesbury by Garry Trudeau for December 27, 1973
Transcript:
Voice: Hello, I listen to the new WBBY! Mark: Congratulations! I'm "Marvelous" Mark from WBBY, and you just said the phrase that pays! Voice: Well, it's about time! Do you have any idea how embarrassing it is to answer the phone like that?! I'm the absolute laughingstock of the whole neighborhood!! I've lost the respect of my children and my husband! And all just because of that stupid, juvenile phrase that pays, "I listen to the new WBBY!" Mark: Gee, I'm sorry, I... Voice: It's a sick game, buddy!
“The phrase that pays” lol I remember that slogan. The radio station I listened to had the same contest. :)