The plague of free to play is spreading.
Lock boxes that require keys to unlock.
Where do you get the keys ?
At the cash shop of cause.
Star Trek Online features this and now so does Lord of the Rings Online. Team Fortress 2 has also been doing it for a while now.
To me, this is gambling and very dangerous so I will not support any system that implements it. My fear is that Guildwars 2 will do something similar.