Many thanks, MX!
I am Changpeng Zhao, CTO and Partner at
OKCoin.com, the former Blockchain.info Head of Development mentioned in the above thread, here responding to your inquiry.
To add my 0.02BTC, we focus on execution. In addition to our superior customer service, etc, we have a few things others don't have.
OKCoin is the first and (so far) only major Chinese bitcoin exchanges to roll out an International Site. BTCChina's Bobby Lee recently said on Coindesk "We [BTCChina] have some intent to try that, but we’re not launching a full-fledged international expansion, so that’s sort of the situation right now."
OKCoin is the first Chinese bitcoin exchange to implement algorithmic trading. Others have followed to some extent, but they have less strategies/algos than we do. For example, no one has Icebergs, TWAPs yet.
OKCoin is the first (and probably still the only) major bitcoin exchange to release mobile Apps on iPhone and Android that support touch-to-trade, as well as Candlestick charts, price alerts, etc. No one else have that.
OKCoin is the first (and probably still the only) major bitcoin exchange to release bitcoin Futures. Now if you are a miner, or a merchant accepting bitcoins and don't want to deal with volatility (the single biggest complaint about bitcoin), you can lock in your bitcoin earnings with futures. We just added a 3 months Futures based on user demand. No one else have this.
Lastly on the volume, a few of our competitors mistakenly thought our volumes are fake, which is great for us actually. Their wishful thinking and denial is to our advantage. Unfortunately, they said a few things publicly, which hurts our image a bit in the short term. But over time, truth prevails. When our competitors finally realized our volumes always were real, they probably said "oh, sh..."
Back to work.