FYI...
I flew LAX-EWR on Thanksgiving day last year (flying through from HNL) with my wife and two daughters. The PC agent in HNL gave a comp. UG (LAX-EWR) to one of my daughters. Upon arrival in LAX I tried every charm with the PC agent and was expectedly rebuffed for the extra Plat. Comp. UG.
We got on the flight (me and one daughter in FC - wife and 2nd daugter in Y) and considering it was Tksgiving day the flight was empty. FC on 757 was almost empty.
Still couldn't move one more up front......