I just tried booking reward travel for YOW - YQQ in late Feb. Very pleased to see 125 flights come up, and 25 combinations when I downselected to "Business", but every time I try to select one of the options (including some of the original "Economy" ones, I get a notice saying:
"We’re sorry, but due to real-time availability, the number of seats you requested is no longer available on the flights you selected."
AAARRRGGGHHHH !!