Basically, online gaming for the youngster set is huge, and only growing bigger. And while what they're playing now isn't too exciting (most of it is all clones of each other, with not much more social interaction than chatting between minigames), today's AddictingGames.com players are the MMO players of tomorrow.
Think 10 million players is a big number for WoW to hit? That's nothing compared to the flood of young online gamers coming up right now. To them, there's no difference between online or offline games -- games are online and social, and Nickelodeon's big order only means there are going to be more and more of them.