Connections
virtual economy
Entity
China
Country
Facebook
Concept
Wayback Machine
Entity
social media
Entity
service
Entity
goods
Entity
social networking service
Entity
World of Warcraft
Entity
encryption
Entity
Valve Corporation
Entity
social network
Entity
Blizzard Entertainment
Entity
massively multiplayer online role-playing game
Entity
Tencent
Entity
hash function
Entity
Second Life
Entity
online game
Entity
avatar
Entity
digital currency
Entity