After reading all the warnings, I tried to make a withdrawal from the site. I know it is a small one, about 0.01 BTC, but I must say right after I confirmed the withdrawal, it went through and here is the tx: f95d2de21c1ec18891e9a9ae5081827918c75404d357e6bcd1d7ef1ccf668ada .

I understand that there aren't proofs to be sure this is a ponzi or a legit cloud mining operator, but I can tell for sure that I've been able to withdraw my funds at the first try, without any trouble.