Jorge:
http://www.coindesk.com/huobi-ceo-addresses-fake-trading-volume-rumours/

'When I asked him to estimate how much the lack of fees might distort the trading volume, he said that he could easily see a “5-times increase” in trades because high-frequency traders can make profits off of much narrower spreads.

Instead of just volume, Li believes that customers should evaluate exchanges based on their liquidity, depth, and the size of the company. At least these are the metrics that he is measuring Huobi against competitors'

Basically, Li thinks that a platform will need to make its revenues from value-added services rather than trading, which he sees as a basic service and a commodity that should be free for consumers.