Well I cleared so in the end I didn't get hosed but this is not the first time I've seen funky things happen when the PM window opens up over the weekend -- I don't think I've ever actually cleared on a weekend, even when the "sniff test" points to what should (I know not guaranteed blah blah blah) be an upgrade at the window (last minute booking, high fare class, tons of open F seats, short flight like RDU - JFK/LGA/EWR that I clear 95% of the time, etc.).

For this one, LAS - SEA was a Mid-week, mid-day flight on a 738. C+ was almost entirely standby/BE passengers who cleared into C+ at the gate (there was no C+ upgrade list at the gate and it would've gone out with multiple rows either empty or with just 1 person if they hadn't cleared BE/standby into those seats).

Like I said, I get the game, it just seems that there are some weird things that happen when the window opens over the weekend and what should be an obvious clear doesn't happen and it seems odd.