When users here have posted about scams I have in the past advised them to contact the domain registrar and I still think it is something can do while they also continue to warn others about scams and potential scams but looking at what you said I can understand if there is reluctance.
Even after more than 18 months since that chipmixer.one website was reported, it is still there available for anybody to visit if they find it. It must be highly frustrating that even when someone take steps to inform domain registrars about scams they literally take little or no action.
Just to make sure that I don't get misunderstood because of the previous post.
Yes, it's damn frustrating to not see action taken, and it's frustrating to not even get a reply on your ticket/report, but at least for me this won't be a stop in sending a few emails, after all, it's a 3-minute thing that could prevent somebody losing years of his earned money to a piece of something scammer. And a ton of frustration comes from the lack of feedback, at least if they would deny it, if they would say like Twitter did that they haven't found any problem with an account promising double the money, but the silence is worse than this.
It will be interesting to see if the same account owner can buy that domain later. Sure there will be some system in place to avoid the old owner from buying it again.
Since the .one is now redirecting to the .xyz I don't know if it's the same guy, but for certain it landed in the hand of the worst one to date, the owner of the xyz that now tops the search results because of his fake complaints to Google.