Some Agency's are fair.. others less so. What many don't know, is that there are different income levels for a group, depending on activity. I'll give 2NE1 as an example. Okay, so basically 2NE1 went into a sort of hiatus at the end of 2014. During 2015-2016 their individual contracts were up. Now, we don't know all the reasons Minzy did not re-sign, but part of it was money. YG paid their established artists a certain wage, based on their activity. In short, 2NE1 made more money, during active promotions, then when they were not promoting. (Outside of appearances, concerts, CF..ect..) So Minzy was in a situation where she would have a lower income. 2NE1 was up in the air, no CB in sight, Dara, CL had other things going on. Minzy did not even get a song to promote. So for her, it looks like her earning potential was being hurt, and money talks, bullshit walks. I suspect YG did not offer her enough, and combined with other things...this pushed her to leave YG. TLDR When a group is not promoting, or opportunities are limited, they are making less money. Combine with smaller agencies and smaller budgets, you can see how it's not all Glamour and Roses.