Because most of cloud mining will scam in the end
Cloud mining is not profitable anymore because of the difficulty and electricity usage they use
I've registered on so many cloud mining that it makes me sick with all the scams that happened
The only legit cloud mining i know is hashnests made by bitmain who made many mining equipment
Good luck
Look at Hashnest, that is profitable.
Hashocean, simply state, that they take 10% of all revenue for themselves for maintenance costs.
To me, it makes more sense to keep your chips with them and not redeem them (you have to pay for electricity on your own if you redeem)!