I always thought it was a bit cheap i dont get my stickers for every 10k -- I have 60 upgrades in the bank as i usually fly F domestically and when I fly Y - not that much - i get the great courtesy upgrades. That said most of my upgrades are EARNED for intl travel and im sure i use far less upgrades than i would have earned . It is nice that the bank doesnt expire though ^ - i remember when DL did some type of program enhancement i ended up losing a bunch of banked upgrades - at least 30