OP I tried to go through the mixing process, but I am not seeing any letter of guarantee anywhere. So what happens if a dispute a rises in future? How does a user prove that they actually used your service to mix their coins or not if they don't have a signed message from an official address of yours?
Also, there is something off about some blogs like this that you made - https://[banned mixer]/blog/top-bitcoin-tumblers
I believe most of the information is not accurate. Also, which one is Bitcoin blender (If I recall well, I think Bitblender.io and Blender.io would use that name on their websites, but the mixers been defunct for some time) yet your blog was just made a month ago.