We spend a good bit of time balancing which exchange to use, how often to trade the coin, and how the coin will be calculated in the profit scoring system due to the price decrease that occurs when large amounts are sold at a time. While it's not always perfect, we do strive to get the best "bang for the buck" when it comes to exchanging. You should notice WC is much closer to going market rates moving forward as we've made quite a few changes in its trading process to accommodate the large volume we've been pushing.
As I mentioned to another poster, I do not envy the task of exchanging the proceeds of a multipool. I could add to the above that the exchange options exist only
after the deposits arrive and are confirmed.