One of the current trends in the video game industry is the move to massively multiplayer worlds, which are both addictive and expensive. Many gamers have been hooked to these types of games logging in months-worth of game time over the course of a year.
Some gamers have even died participating in binge-gaming sessions. In 2005 a girl dubbed 'Snowy' participated in a 36-hour game session which led to her death. If addiction wasn't a big enough concern, most of these games require subscriptions in addition to the cost of the game itself. Some titles such as World of Warcraft boast millions of users who pay $15 a month to keep their characters outfitted in the latest and greatest gear.
Some games such as the recently released Hellgate: London don't require a subscription although they offer one to gamers who want additional loot, more monsters and special quests. If a player unsubscribes they loose all their special subscription items.