Chinese site QQ generated approxmately 88% of it's revenues from value added services in 2008

Inside Tencent Presentation

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"QQ made over $1bn in revenue in 2008, with 40% net margin
This came from approximately 8% of its active user base
$719m from online value added services
$205m from mobile value added services
$121m from advertising"
Source: Presentation from Plus 8 Star, August 2009, charts 11 & 17