personal note: looking at coinjoin.io
The website has only 1 page and nothing else. If you click in the menu on "how it works", you're redirected to a link from Investopedia.com and the "Github" to Github.
On the footer, it says 'the company'... which company are we talking about, it's a mystery.
Enough shady to me...
When you start to mix and get a Bitcoin address if you check it on an explorer the address has zero transaction.
I found a comment from someone on Reddit who got scammed by this service.
After searching a little more I found this website was offering some kind of investment with high return. The typical scheme for an HYIP.
Apparently up to 110% ROI (
see here). You can notice the comment was posted on 25 April this year, so quite recently.
The website is surely archived on Archive.org but Internet Archive is offline due to a power outage.. At least with Archive.is it shows me
thisEDIT:
After looking on Archive.org I found several snapshots. Most are the same as found on Archive .is but there is this one interesting
https://web.archive.org/web/20210223201720/http://www.coinjoin.io/enNotice the design is the same as Bestmixer.io (and the current scam bestmixer.mx too)