>>82225579They force the girls to pay all the expenses for their songs - studio time, animation, editting, art, the works. Matsuri talked about it and I think Marine did too - it costs them like 10k USD per song and that's why even veterans usually only have 2-3 orignals.
Cover 'could' stop jewwing and maybe give a shit about the quality of their work, but I wouldn't hold my breath if I were you.