“…wouldn't it be nice to hear more than 20 of them?”
So goes one of JACK FM's tags. I take issue: let's look at the facts. Assume a song is 3 minutes long on average. Assume that I listen to songs for 3 hours a day every day, never repeating a single song. Assume there are no adverts or other song interruptions. And further assume that once I hear a song, I know it and I never forget it. I think these are pretty generous assumptions for computing an upper bound on the number of songs I know.
That's 20 songs an hour, or 60 songs a day, or 21900 songs a year (not counting leap years). I think you see where this is going. Under this scheme I won't be hearing my millionth song until I'm 45, and that's assuming that I still know all those songs I heard when I was a baby, before my memory was working properly. I'm guessing JACK FM's target demographic includes a large number of under-45s.
The irony of the situation was compounded by the fact that they then proceeded to play “Your Lyin' Eyes” by the Eagles.