Added it to my presets pretty much on day one that it appeared. Not that I'm doing deep comparisons, but to my initial listening, it seems to have some overlap with Ben FM. Maybe Pop Rocks is more 90/2000 while Ben is more (but not exclusively) 80s/90s and includes more pure pop, but there's still a passing resemblance. Beyond that, for the time being, I don't see anything that's more or less Pop Rocks being a widespread OTA format. It seems better suited for satellite (and streaming).