So this one's just a gap in my knowledge, because it comes up so rarely.

Mrs. G and I are flying YOW-YVR next week, on a 7M8 flight that's J8 R0 and likely to go to Aerolotto at the gate.

We're currently waitlisted with eUp credits from her account, we're on a single PNR, and we are SE and 50K, respectively.

Let's say for the sake of giggles that the flight ends up J2 at the gate, and the only other eUp request is from a 75K. Who will get the 2 remaining J seats?