I'm sure they are aware, and in fact I have been unable to log-in for last 20 minutes as they are 'Undergoing Maintenance, and will be right back'. I made the mistake of refreshing my browser.
It's disappointing this keeps happening on the first night of team challenge though.
I wasted my first free 30 minute XP doubler and a further 1hour token so far, and although they usually send a couple of free tokens for the inconvenience, it gets the team challenge off to a bad start, because some players get fed up easily and leave for the night to go find something else to do.
Also, I