(posting here as Bitcointalk does not allow linking to mixers)
After doing some investigation, I was able to independently verify these claims.
I am not sure whether these are allowed to be posted in this section of the forum or if they should go into investigations, but given that there is no sensitive data being shared beyond what was already posted on this thread (ages ago), I think this will be all right. But anyway:
Among other things, user grozdniyandy reported that the YoMix domain was on the same IP address with some other mixer domains, including digital ones (from which we can conclude that they belong to the same person). A little more than 2 weeks later, the same user reported that YoMix had changed the server.

https://bitcointalk.org/index.php?topic=5477452.msg63892572#msg63892572 <--- on bitcointalk
Proof: Go here -
https://search.censys.io/hosts/79.124.40.25/data/table?resource=hosts&sort=RELEVANCE&per_page=25&virtual_hosts=EXCLUDE&q=yomix.io&at_time=2024-07-04T06%3A50%3A29.175Z#8081-TCP-HTTP
Scroll up and on the top right click Raw Data > JSON
or go directly to
https://search.censys.io/hosts/79.124.40.25/data/json?resource=hosts&sort=RELEVANCE&per_page=25&virtual_hosts=EXCLUDE&q=yomix.io&at_time=2024-07-04T06%3A50%3A29.175Z
Interestingly when you search for the YoMix domain in Censys, it shows this IP address, the one for DDoS-Guard (their CDN), and a third IP address that is for a blog website that will be relevant for later.
In Censys you can find the port number allegedly used here just by Ctrl-F Find in your browser and searching for the domain name. Here you can also find all of the other shady sites running on this server, but only one of them looks exactly like the YoMix website.
At first, it may not look like they are identical. When you go to both the website on that weird-looking server and the official website and you make an order on both of them like this:
http://79.124.40.25:8081/order/view/2BZ2-L2XN-VSFC-E67Thttps://yomix.io/en/order/view/9rVW-2PqB-pCDo-6541Now try to switch the order IDs. It will say the order doesn't exist. So the order software appears to have been replicated by this other server.
...
but the YoMix API software is not publicly available, it is not even on hacker forums like XSS (otherwise people like icopress who can access the forum would know about it).
Another thing that at first glance might indicate they are unrelated are the letters of guarantee:
-----BEGIN BITCOIN SIGNED MESSAGE----- We (YoMix.IO) have generated the bitcoin deposit address bc1qlqj80vzxntreuzr4zjhcx65jn7rzq8zdnpllcl at 2024-07-04 11:04:30.597031 for the mixing order with id 2BZ2-L2XN-VSFC-E67T. The output address(es) are the following: 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa. Our fee is 2.386% and 3150 BTC mining fee per output address. This mixing order is valid from 2024-07-04 11:04:30.597031 until 2024-05-28 16:22:40.923084 (if will not be extended) for amounts above or equal 0.001 BTC. -----BEGIN SIGNATURE----- HGvHlBLsEGD072ktbo2Yz+n13VChrHKUJ46OmBqdbHMiBP13h4fz5NyuQ0XkU9/H+4fkwryaD+nZnJaOU9S2ojc= -----END BITCOIN SIGNED MESSAGE-----
-----BEGIN BITCOIN SIGNED MESSAGE-----
We (YoMix.IO) have generated the bitcoin deposit address bc1qxr3fqywxes9t6ejmaqnkdftllzageqahr5wt0f at 2024-07-04T11:04:24+00:00 for the mixing order with id 9rVW-2PqB-pCDo-6541. The output address(es) are the following: 100% of deposit amount to 1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa after 70 h. 53 m.. Our fee is 4.405% and 0.0000744 BTC mining fee per output address. This mixing order is valid from 2024-07-04T11:04:24+00:00 until 2024-07-07T11:04:24+00:00 (if will not be extended) for amounts above or equal 0.001 BTC.
-----BEGIN SIGNATURE-----
HFil1mK7g5tGF7dcKSsjqoFneqM/vk1vj1/msY+1PZbZGrE+oYcNwZNC0sdQidxNAUMSFcBvnbMFmX4Nc/uZz5Q=
-----END BITCOIN SIGNED MESSAGE-----
But when you verify them at
https://brainwalletx.github.io or with any sign/verify message tool:


So all the signs
maybe point to these sites being operated by different people, right?
Wrong.Remember that third IP address that came in the Censys results? Well it turns out that it is the IP address for this blog:
https://rainorshinepdx.com/
I do not trust the contents of this blog, so I put it in code tags.
But inside the blog, there are a bunch of articles, one of which is about using Bitcoin mixers. Quite surprisingly, they all link to YoMix.
The kicker here is that this website appears to have been either hacked or using a second-hand domain, because up until 2023, it was showing a website for a coffee house:
https://web.archive.org/web/20220314182228/https://www.rainorshinepdx.com/Interestingly, that seems to align with when YoMix was first started which was around January 2023. It seems far more likely that this website was hacked, because you know, why would someone buy a random domain to write a vaporware blog with?
Remember, these sites were all linked together by Censys with a search of the yomix domain name.
So why would someone use keyword stuffing to link only to the YoMix website, in a bitcoin mixer article that doesn't mention any by name, on a hacked website?
Why would YoMix run a counterfeit site of their own mixer to scam people with?
To be honest, I don't know the answers to these questions. But I do know that the other sites like Blender, Sinbad, etc are run by the same people who have access to the YoMix.io website (but not tornado cash - let's remind ourselves that tornado cash was an open source project with real faces, so these yomix people must have ripped them off).
Please, stay safe, and do not use mixers that are obviously ran by criminals in violation of sanctions. You will lose your money, and other bad things might happen to you.