If its closed source, assume malware that will steal your coins. Delosminer just got caught doing this and emptying peoples wallets.
If this miner is truly free publish the source or else by default this is a piece of malware that will steal everyones money.
Stop judging people stupidly !We have explained the reason and you stay free to work with our solution or not ,even develop your proper miner to be sure that you aren't stolen (even I doubt that you can do it)