The owner of this site has found an easy method to scam people with Website+TelegramBot+Self-moderated threads. User :
There are so many stickies,advices and warning that we keep on giving but people still yet to keep trade in this matter. You can't entirely stop it, just the best you can do is to reduce the no. of victims by spreading advice's.
You know what I find interesting? This guy is using the same abusive language as his fastkey.io nemeses.

Fastkey admin/supporter of that site wrote a thread in scam accusations about the site and them being group of people who are not connected (or say same person) promoting their own shops. I did got a hint of this but there isn't much evidence present so I assumed they all are same.
Even if there are different users, for me anyone selling through that site which is allowing people to sell illegal goods at mass order shouldn't be let go. In my books you kinda are promoting the site.