That is correct. Stations like KPYK have virtually no billing except for time they sell on the weekends to Churches and people doing a music based show. For quite a few, if they can sell $1,000 a weekend they're happy.
Everyone seems to forget radio, in almost every instance, is opportunist in it's approach. If there's enough people that will listen, the station will provide that programming because they can monetize those listeners and earn income to pay the bills. When there are very few listeners, it goes away because you can't make enough money to pay the bills. Radio works just like any other business in this respect. The death of this format does not mean radio is going further down the tubes but rather that radio is becoming viable for more people through this station's format change. It might not be to your liking but then you not are paying their billing and trying to meet payroll for the station.
At least we can be happy the station existed for as long as it has. It was done well with DJs and jingles versus a computer in a closet playing jukebox.
As for KPYK, it was once KTER and for a couple of years was owned by Dick Zimmer (Bill Pirtle to Dick and back to Pirtle). I worked there about 6 months. You could count the commercials each day using both hands without running out of fingers, but the weekends, as in Noon Saturday through Sunday, it was almost wall to wall paid programming back in 1980. Then again, Zimmer didn't sell cheap commercials. As I recall, even when Pirtle had the station it was automated much of the time.