Originally Posted by
MSPeconomist
If you want a C+ "upgrade" you should be sure to ask the GA whether C+ has BOARDED full before you board. I would expect many FAs to follow the YBYL system just like they do for FC upgrades.
I would expect this to be even more commonly followed in C+, where to GA's it's really all just main cabin and the goal is to get the flight out on time.