Over time, Homer and Jethro's patter became more sophisticated, giving them access to mainstream audiences on network television and in Las Vegas. On May 12, 1960, they appeared with Johnny Cash on NBC's "The Ford Show, Starring Tennessee Ernie Ford". In the 1960s they were hired as commercial personalities for Kellogg's Corn Flakes; their "Ooh! That's corny!" television spots gave them exposure beyond country music audiences. One relatively notable gig was in November 1966, when they entertained at the grand opening ceremony for the Dixie Square Mall in Harvey, Illinois.