A new event and event arrives in Champions Online that can net you some Questionite. Millennium City is under siege once again as Doctor Destroyer, or a pretender, has unleashed an army of Destroids on the city. Players pay a visit to The Drifter in-game each day to complete his daily mission to earn a box of Questionite.
In addition to the recent event, Perfect World Entertainment has announced that since the launch of Champions Online more than 1.7 million players have created over 3.5 million Champions. So with any luck you should have plenty of backup.
Sources: Perfect World Press Release, Destroids Invade Millennium City