in a thread with an other subject, a person pasted the follwing statement:
Why is that the case? Does a mixer try to follow the entire way of Bitcoin funds, and if the "path" is intransparent,
mixing is not performed?
That's not what the member meant. It's the exchange that try find the origin of the funds, not the mixers. Mixers don't really care.
Exchanges do that because they have rules and regulations they must adhere to. ChainAnalysis's KYT (Know your transaction) is something a lot of exchange use for that purpose: https://www.chainalysis.com/solution/crypto-risk/
This helps exchanges block transactions from darknet markets, exchange hacks (a hacker hacking an exchange, and then sending the funds to another one) etc.