http://fuk.io/cexio-ghashio-jeffrey-smith-interview-exclusive/ my interview with their CIO about current/future.

From Petamine thread.  




https://www.havelockinvestments.com/order.php?symbol=PETA

We re just getting goxxed at CEXIO.... Really too bad.

https://bitcoinwisdom.com/markets/cexio/ghsbtc

If mining is not profitable, why difficult does not go down?!?
CEXIO is sucking the last drop of its customers, thats the truth.

Change it, CEXIO! Evolve! Be serious.

I have only good experiences about cex, but you need really trade there if you want roi. buy, mine, sell and buy & mine again. You can also lose fast if wrong timing.

CEX.IO Bitcoin Mining Return on Investment Calculation
Very good summary here:
http://ppalme.wordpress.com/2014/01/20/cex-io-bitcoin-mining-return-on-investment-calculation/

Altogether from my point of view one can say that mining does not have any benefits for the customers.
Here you kann see how the price per GH/s reduces 10.5 in 7 Months:
https://bitcoinwisdom.com/markets/cexio/ghsbtc

The earning through mining (for example with 100GH/s) is about 0.0003 BTC in 5,5h, Maintenance included, 0,2% Fee not.
I will test the Cloud Mining of CEX.IO some days more, but it looks like a useless invest.

I think with this low earnings the Mining-ROI will never fund the loss of the invest for the GH/s.
And Difficulty increases two times a month and then you have to reinvest in GH/s to get the same earnings like before.
Maybe a good ROI is possible with "daymining" with very high investments > 5TH/s.
But the risk compared with the possible benefit ...

Sorry, currently i´m not convinced.

I don't have a CSV for historical GHS price, but you can check on https://bitcoinwisdom.com/markets/cexio/ghsbtc for the GHS price since Jan 2014.

and that happened last when?

I am thinking I should have found this forum before trying to trade on cex. Would have saved myself from a "lost deposit".

1. verification is a nightmare I had to hold my debit card in my hand close to my face and somehow take an antishake screenshot with me iphone.. not easy on my own

2. fiat withdrawal is so sloooooow ive been waiting now over 6 days (sepa) to see money in my account and i live in the same god damn country as them

those are the only issues i have with cexio i will now abandon their services and use stamp they've never mucked me around on fiat withdrawal i only have to wait 3 days max and sometimes its filled on the same day using sepa even on weekends

this is unacceptable your anti-fraud checks impede my ability to trade its OTT and only do it for your self interests ive never dealt with such gayness in my life even my debit card deposit took over 3 days... no different to bank deposit... when i complained about the slowness and gayness to card deposits they sped it up after a month...

now debit card deposits are instant and thats what is should be ffs i shouldn't have to complain to get things done thats the last time i use you guys ur just a pain in my ass seriously... speed up the withdrawal process it just gets in my way

its a pain in the ass when you advertise debit card deposits and then it takes over 3 days to buy bitcoin not cool not cool at all but im glad u sped it up now speed up withdrawals its just rediculous if it wasn't for your slowness i would've bought some gold by now...