Views and streams make very little money. Most profits come from albums, merch and concerts. Boy groups have more dedicated fanbases, so they make more sense for smaller companies or new agencies. Girl groups do well when they are from big companies. Profitable girl groups from smaller companies are extremely rare.
Pledis used to have big chances before they got bought by Hybe, since Afterschool, Orange Caramel and Pristin did quit well, but as you see, the ex. members of After School had been unhappy after a forced hiatus for years with no end in sight and when the last girl left Pledis, she expressed how it was even impossible to talk with the management about her situation. Randomly, only after After School had disbanded Nana somehow became very famous, to a level that some people even claimed her as most beautiful woman in Korea