Even with the raised fee, people are still trading at OkCoin and BTCC with huge volume compared to other exchanges.
I don't find huobi in your second pie chart, is there any reason for that?
Well, China is the World leader in most of the things and bitcoin is one of them. They have enjoyed lots of trading without fee in Chinese exchanges and now with fee wont let them back away. They are indirectly manipulating the bitcoin prices to their best interest.