Recently, Sony announced that it would be shutting down the servers for an online collectible card game called Star Chamber: The Harbinger Saga, which SOny had bought some years back. This effectively renders all the game-related collectible cards people bought, worthless. Sony To Delete Virtual Goods
Lesson for virtual goods buyers: Any server-based digital goods you think you 'own' can disappear whenever the company decides. In all effect, you have only 'rented' a virtual good, not 'owned' it. This is also the truth about all cloud computing. So, back up all your data up in the cloud, which basically the whole cloud computing idea is so bogus.