Originally Posted by
pgh234
I believe the free upgrade was available for a "main cabin" round-trip ticket that was under $400.
Keeping in mind you are only going to get water and a snack box.
That's my interpretation too -- that OP meant that "Upgrade Available" was the indication in the eligibility column (hence you would be upgraded as soon as you completed the purchase, more or less, barring any lag/glitches that occur from time to time), not the amount of an FCM offer.