Dataotuan.com has published its December 2011 report on the Chinese Group-buying Industry including the year 2011 overview.
For the first time data from other Asian countries are included as well, See also our Asian Group-Buying Market infographic.

2011 is the year that the Chinese Group-buying market got more and more concentrated. The top 10/20 deal sites took a bigger and bigger market share.
There are 2 kind of deal sites in China. For now Independent websites, like Meituan are leading but it seems that affiliated deal sites like Nuomi are catching up. Continue reading