Mea Culpa.
After reviewing all the information, it is 10000% sure that coboguard who pretend to be a scam hunter is actually a scammer,
behind tether-tumbler, bitwhisk.io, and many others.
He also try to scam people by using a modified chipmixer Tor URL.
I thought chipmixer might be his website as well, as he advertise it in his bitcointalk profile.
But I have to admit, i don't see any real proof that the real chipmixer belongs to that scammer,
moreover the quality of the website chipmixer makes it very different than coboguard's crap scam websites.
Let see the bright side, since I came to expose coboguard the scammer,
he deleted tether-tumbler.com,
www.bitwhisk.io and other of his scam !