In March they did have a couple days where there was a 20% discount on points redemptions. I got over 1.7 c per point which was not bad. Generally it seems the more likely they are going to sell full fare seats on a particular flight the more points it takes to redeem which makes sense. Legacy carriers can charge 2 or 3 times as much to redeem on peak flights or not have any availability. At least with B6 if the number of points for your redemption goes down, you can always reticket and get the difference in points back. Also if the fare goes down the number of points required generally goes down as well. Take advantage of the sales and save yourself points.