Originally Posted by
findark
Buying Y also has nothing at all to do with the seatmap, although there is a "secret limit" imposed by RM where they won't keep overselling into Y0 beyond a certain amount. It's very rare, but got hit by things like people trying to go see the eclipse.
Very possible, but inconsistent with what I've been told as a GS (although others, e.g. DL, definitely work the way you describe). As a GS, the policy has always been very simple...open seat assignment, can Buy Y.