You might have been caught in the net when we removed thousands of free miners created by abusers around Hashie's launch (when we had no "must purchase to withdraw" limitation). We cleared these miners to make payouts run faster, but it has also caught miners that weren't created by abusers while matching the pattern. Please use the support form and we'd be happy to help you.
Our wallet obviously has customer deposits in addition to mined coins. We don't mine directly to that address (which also isn't our only address), and mining earnings from NiceHash / exchanged MM coins don't look like from a pool.
PS: If you think we're a scam just because of this, you should look into GAW/Zencloud and pretty much every service that uses a Bitcoin wallet..
-Sahra