I thought PP card is supposed to waive close-in award booking fees? I just booked an award less than 21 days out, paid the taxes with the PP card, and was charged the $50 award fee. (I'm Silver)
ETA: This award was originally Farelock'd, which seems to be the issue. When I did a new award booking for the same itin, the $50 fee does not appear. Just another bug in UA's IT, I suppose.