Curious about what my chances are for an upgrade on UA 872 TPE-SFO on 9/14. Applied a GPU on a W fare a while back and have been checking for R space constantly but nothing is opening up. Inventory seems to be in flux a lot too- there was Z9 and ZN9 for a long time and P9 that comes and goes. Now it's Z0 and P0. Been checking the cablepick tool but it seems that even with the inventory changes, business class is not being booked accordingly. Anyone know what the deal is? Also any opinions on the GPU clearing would be much appreciated. Thanks!