Originally Posted by
Flying for Fun
Why should you be surprised? If only Full Y is available you would need to purchase a Full Y fare to use the GGU to upgrade to F. That would generate a lot more revenue than the value of the miles for a saver F award. Sometimes purchasing F outright is cheaper than purchasing an immediately upgradable fare for MVPG75K.
Well, no GGU needed (or possible) to upgrade from Y, even for MVPs. But the fact that Y is all that’s for sale doesn’t mean there’s no one booked in a cheaper fare class. (In the post I made that comment about, the OP was no longer talking about the MCO-SEA flight with only full Y for sale.)