Directly from their cloud mining page:

Number of GHS 4.0 (SHA-256) = 0.26 USD (0.00011933 BTC)
Estimated Mining Payouts* = Daily: 0.00000022 BTC

*Cloud mining should be considered as a fun, recreational activity and not a source of income or investment. The above numbers reflect no difficulty increase. Investing involves risk, including possible loss of principal.

At the rate of 22 Satoshis/day it would take 542.41 days just to make your money back and that not even taking into account the difficulty changes which pretty much always increase. If you purhase cloud mining you will never even make your money back never mind a profit.

Now, ignoring all that, why are they letting you use their "cloud miners" (which they've never provided any proof of owning) for free?