hmm, it's really depends view, some miner said if bought it hard to ROI,
but the other said easy to ROI,
my view is hard or easy to ROI just how we can manage our hardware, sometimes we must be a risk taker too,

hmmm,don't invest in cex.io,
so many high fees,and diff increase too,just make u loss your money,
maybe u can search an alternative option to cloud mining if u want,

maybe u must invest it in ATM bitcoin,maybe the maintenance fee is high,but if we see in the future,bitcoin have a high chance to spread around the world, so u can be a leader in ATM bitcoin developer.
and for risk taker,maybe u must find a good partner to this, maybe with bittrex or another exchange,so it can educate other people and make money too,

maybe so much people thinking make a 'mining' as an investment,
but maybe not for a trader,
so,when we are put our money to something,ofcourse we want it back,especially when we have a profit,
ofcourse that's a humanity,
right or not, every people have a different view,

I am a student too,
when I start it a couple month ago,I have a limited budget too,
but,beside a cloud mining,I try trading too in Bittrex,
maybe u can try trading,just to increase ROI,

maybe u can buy an ASIC, sha 256 or scrypt,
but no guarantee for asic too, because if we use a GPU, maybe u can sell it again if we want change,maybe to other gamer who need it,if asic,u can't sell it again,
so,which the best, u decide again,

maybe we try calculator in coinwarz,
always update in everything,
just try it,

Maybe u can try scrypt.cc,
alt coin,but profitable or not, who know,?