I confirm that this is not a scam. I received both of my payouts very promptly and all of the site worked for me. Also I could daily withdraw my profits with no fees. I do have a little suspicion in me that this will eventually crash, but think of it this way. Trading a lot of money will make it a bit less volatile but the profits you make will be less than in short term investments. If cryptcominer can get more users funds, they can profit more and make it easier to pay back the 3% or whatever. They can make probably 5% or more per day if they work hard and are smart.
I see that you have no idea how hyip works

Ahh, well I'm trying to be a bit optimistic, but like I said I have a suspicion that this will crash. Sig campaign is WAY too good to be true, on top of their 5% payout investing. Its in gambling for a reason I guess.
This is why you can't confirm it's not a scam. The trust games work until they stop working completely, for everyone. There is no trading, you can't possibly make 4-5% a day from trading a variable lump of money. If you knew exactly how much money you held and had weeks to optimize your algorithm, it might be possible to get 2-3%. But to get 5% from day one on any sum? They are also paying users for promotion, and bought that CCN article (for probably 2 BTC or so).