What do you mean you give us free money ?
Don't bother listening to that guy, hes just trying to spam his referral link so that hopefully someone signs up and he makes a commission. I wouldn't get into cloud mining until you know what your doing, so do some more reading and understand that no-one gives you free money (aside from the faucet which give you like 0.00000000001 anyway). Understand what your getting into before investing is the best advice I can give.
I am not sure about the commission, but buying some GHs on cex.io does not seem profitable at all.
But, why people do so?