Do a search in ninjastic and you will see general statistics for that.
Again, I will repeat this, according to new rules any service without kyc verification can be considered as a mixer, so better think about that.
Anything that increases Privacy can also be considered as a mixer, now that can easily be considered when using coinjoin, joinmarket, maybe even Lightning Network in some cases or exchnages that supports it.
In general we should not mention anything about privacy anymore, that is how it looks to me.
I believe you are reading into it way too literally. All I see is that it's about mixers, which is a specific service as per the OP.
And I can't really search for that in ninjastic as there is no way for me to know if these would be discussed if it weren't for a signature campaign, review campaign or similar.