Aespa is rising but BPink hasn’t flinched even one centimeter despite their hiatuses. On the other hand RV ranks lower than Aespa. This demonstrate that Big 3 popularity depends a lot a on a large pool of company stans (and those who dont consider themselves company stans yet still follow groups from the same company).
BPink’s fanbase should be stable until YGNGG. Aespa ate away at RV’s fanbase the same way NiziU did to Twice in Japan, causing lower Twice sales compared to the past.