Unfortunately nothing could could be done for Birb since she has health issues, but Coronoona was simply stolen by the one big China and put into some idol prison
I explained to you already that these days it matters way less. They just need to look like they are making it and then they will make it because of that.
If you appear that you have a lot of influence over people (social media interaction, views, etc.) companies will throw money at you to get to those people
this is pretty much the worst case scenario but if Jiho had real problems with anorexia I'm sure WM would do everything to hide that fact, since she would be the second member in OMG
Oh yeah, album sales definitelly help a lot, but if you think JooE bought her parents an expensive car from those 20k albums they sold, you are mistaken. She made that bank from CFs and festival performances.