
Figure 1: Virtual world account holders by age tier as of December 2011.
Source: KZERO, Virtual world registered accounts reach 1.7bn in Q4 2011.
On average, users have four avatars and are active in multiple virtual worlds. Habbo Hotel and Second Life are still well-known virtual worlds, the latter with 20 million regular users. Further, over 100 open sim grids are running using Second Life’s platform software, one of the larest of which is the education-focused Reaction Grid. Entertainment, socializing, and education continue to be application areas of focus in virtual worlds. Premium subscriptions, and in-world advertising and product placement, as well as virtual product and service sales remain the business model.