I have a waitlist for NRT-SIN SQ11 in J for more than a month. It has not cleared yet, with 3 days to go. And yes, SQ YVR as well as SQ SIN had been sending a push request, but failed. I am booked in D class. Unfortunately, I do have to travel that day due to prior commitment. Now I have to start to look for other airlines who can take me to SIN this Tuesday from YVR.