Originally Posted by
jarusoba
3 weeks ago, I was keeping track of a flight YYZ-PEK. It has been R9 until 23:50, 10 minutes before the 7-day window!! When midnight came, it was already R1. So I could only ug my wife and I put myself on the WL

I doubt 8 people called to ug before midnight. It must be a trick the inventory management played on me. It stayed R0 and my ug cleared just before the E 4-day window opened.
Actually you'll be surprised how many people stay up just to call in for their upgrades... no advantage for us to close off a flight to 'play tricks' on our tier customers if your upgrade is going to clear anyways. The only time we would close it off is if we think we could sell the seats for revenue. Since your upgrade did clear 4+ days before departure, it was obvious in your case that we went ahead and released more seats afterwards after the initial batch was gone.