Based on my research i'm not going to support it.
There are many red flags like domain was for sale 2 years ago.
https://flippa.com/9365713-mxc-io
Mainly wash trading and no real liquidity
Alexa showing that this website had just a month ago a rank under 900k which is very very bad.Right BTC had already 450k and we all know what bitshares is getting from rightbtc .
In my honest opinion this exchange brings completly no value to bitshares and thats why i won't vote for it.
To be fair, this exchanges does bring some value, since MXC does have some users and is a bit well-known in China, much better than rightbtc.
To compare, there was another similar worker in 2017 to support a contest on Lbank. Nobody traded BTS during most time of the contest, but in the last hours there occurred a wash-trading with 400M or so volume and the money was taken, no follow-up report. Easy money.
By the way, cn-vote has no weight in the authorities of the worker account, I wonder what they can do with the worker funds.
150K BTS each day is also a bit crazy.