IMO the most legit is Cex.io
That's why it is
less profitable
The most profitable now is something like hashprofit. I almost sure it is hyip, but it pays now and will pay some time more.
Did u say less profitable ? From when -ve earning is less profitable ? It is simply loss.
-snip-
Can someone tell me why I got -0.010100 btc after mining for a week in cex.io? I have 500 ghs.