There’s another thread here discussing the reduced likelihood of upgrades, sticker or otherwise, asking whether that is due to increased number of higher level ffs. The consensus seemed to be that there are two factors. Expanded availability of cheap up fare (and use of same by the likes of you and I), along with the concentration of higher level ffs, on certain segments. You know best how the segments you travel load, and only you can decide if it’s worth your money. I’ll be interested in others responses.