Originally Posted by
btonkid12345
The problem is the system would likely clear the next person on the upgrade list into that empty seat before the OP calls to confirm the SDC.
Just because there is a seat open in C+ does not mean the system will automatically open up WU upgrade inventory and upgrade someone to it. Also, OP said he saw a W class seat for sale. I think the main point is there no automatic shift from the Standby list to a confirmed seat just because the seat opened. You need to actually call for the SDC when a seat is shown for sale.