Someone see if i am right on this maths

3 th/s = 3000 gh/s * .11 cents (so sue me i rounded up i know its 10.5 cents per gh/s per month) = $330 a month
in feesAt the time of this post btc is ~ $375 per btc and according to this web site:
https://alloscomp.com/bitcoin/calculatorper Day 0.03743718 BTC $14.22
per Week 0.26206027 BTC $99.55 <.. (this is your payout. 3/4 of that is going to cex.io)
per Month 1.13949421 BTC $432.86 <... that's what a month is so subtract $330 - $432 = ~ $102
So buying 3 th/s on cex will net you only $102 and btw the price of btc/ghs at time of post is ~ .0015 btc =
BTC4.5 meaning you would pay $1,687.50 to earn $102 a month
and Lord help you trying to reach ROI with that 102/1687 = 17 months.
So I'll let you decide is it a good time to buy cloud hashing on cex?
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PS
I know i didn't even count the difficulty increase that will even eat up the $102 profit over the next 17 months.. ((too much of a hassle)) i think i made my point .