Originally Posted by
ScottW
this is a miles upgrade, not a last-minute standby type upgrade. I've never had a problem using miles to upgrade whenever there were any seats available in first/business.
In that case, and I think many here would agree, you've been very lucky up to now. It's not at all unusual for this inventory to be limited. More may become available later. Searching (and buying far enough in advance) can often bring up flights where it's available at the same time as you buy, other times you have to wait.
Originally Posted by
ScottW
Also, the inventory is available for an award ticket purchase using miles (according to aa.com)
MileSAAver or AAnytime?