Originally Posted by striparella
Don't underestimate a full fare economy ticket! These are rare!
Cheaper to upgrade, fully flexible, and maybe, just maybe if Y is oversold you'll be one of the first looked at to op-up.
And on a very rare full Y one-way fare for me a couple of weeks ago, I believe that someone was moved after I'd checked-in online in order to give me an empty seat next to me. Very nice, and much appreciated in an 85% cabin, even though we were nowhere near the booking levels needed for op-ups.