Agreed, it might not be the best word to describe it. I guess one aspect is that on other interviews they at the very least pay for all the work you end up doi

Agreed, it might not be the best word to describe it. I guess one aspect is that on other interviews they at the very least pay for all the work you end up doing. You're normally sacrificing your leisure time which, under normal circumstances, is worth even more than your normal rate. But because of the power imbalance involved, you're expected to do it for free. It just leaves a sour taste in your mouth.