Had to get up at 1:55am but managed to click at just the right time and got a Marriott $250 cert. My only mistake was not opting for 2 for that purchase. Oh well
I should have given up but kept clicking until 2:20am and then everything was showing sold out.
I find the Marriott certs work fine (in Japan and Thailand) if you give them to the staff at check-in. That way they have plenty of time to figure out how to apply them.