I think you didn't read our last answer
I read it, and posting trivial statements like this are meaningless:
We ensure that each transaction is unique
Mixero uses an algorithm called CoinJoin.
-Our mixing protocol is not a simple CoinJoin
Make up your mind! The moment your initial statement got questioned, you changed your story.
Moreover the principle of CoinJoin does not require at all a sending at the same time and at the same amount per user, otherwise no service could ensure it given the impossible amounts to predict.
That's
literally what coinjoin does:

You are totally free not to trust us but we are absolutely not a "scam"
So, where's that signed message to prove you can mix 100 Bitcoin?
When we talk about a non-secure blockchain, we are talking about users' transactions that are traceable and absolutely not about security flaws.
You should work on your terminology, and not just use it as buzzwords.