I generally loathe to give up any miles or other ff credit. There are plenty of business situations where I would - particularly in last minute high dollar situations.. but ONLY if I could pick specific options.. sooner or later these guys will let us see the available flights where the deep discounts are and pick a specific one. Until then, it's useless to me. Risking getting in at midnight on a day when I had a 2pm meeting isn't workable for me.