"The Crows are not the only guild of assassins, but they are the largest, most infamous, and the most ruthless. They've so many rules and guidelines for how business is done- and a great deal of it bows to politics. It is...not to my taste. As I am my own agent? I choose how I handle my contracts as I please and at my own discretion." How they did things- offering their loyalty to certain houses rather than simply to the highest bidder or remaining a political entity all their own? Seemed horribly complicated and from Zevran's perspective among the ranks, quite inefficient.