It seems to be limited right now to the lowest level millage fares right now. The uncharge on most routes I saw was between 1,500 and 2,000 miles. However once again as we saw with the cash fares, these new BE fares aren't lowering prices at all and are just replacing the old cheap main cabin fares and essentially creates a medallion tax. I have booked several 5,000 mile MC OW awards for family and friends on MCO-DCA several times in main cabin so I know this to be true from past experience. I'm sure as what happened with cash BE fares that over time the number of miles needed to UG from BE to MC will continue to increase and will be expanded to higher millage fare classes. #KeepDescending