They did put me on standby when I took an earlier flight to SIN which was sold out (with another few people on the waitlist for flights to SIN that day). I was given priority to board that flight with my OW status, with the boarding pass issued after check in for that flight closed.

With a rather inefficient check in process, I was left with just 40 minutes to departure to get myself from check in counter to the gate (i.e. just 10 minutes as gates tend to close about 30 mins before departure at KLIA).