I’ll have to listen soon but I’m pretty sure in Houston Channel Q and the (now removed) KHMX subchannels is just filled with music trivia that isn’t related to music that plays there instead of ads or PSAsOver the air, at least for quite a while now, they’ve just been playing PSAs. I have The Oasis on now and their last commercial break was all PSAs. I’m not sure if this is because they’re planning on dumping the subchannel, but I don’t think I’ve heard any actual advertisements over the air.