You might consider that this Bot is probably buying his own coins/asks. Since the asks gets pushed lower every time a normal user(if there should be any left there) are putting a ask order in between. Without this Bot volume would go down about 80% more. Putting Gox in a league with Cryptsy - Kraken, lol.
I still trade on Gox among others I know, it's been a pretty flawless service besides April.
100% to increase my btc holdings mind you, but I think there's still a few who have faith.
Besides, with a 10% increase in price, if you don't mind waiting a few weeks (if you think the price will slowly decline down for example) it's a smart move to buy on another exchange and withdraw from Gox, easy arbitrage.
Huobi is looking dangerous..

Mtgox has no verified USD withdrawals since Sept 2013. Even EU withdrawals is like once a month for a small amount.