MixTum is a sort of whitelabel mixer operating on behalf of Jambler.io. On Jambler's website they have a diagram showing that all BTC that passes through their platform is evaluated through a scoring system. When you look at how their scoring system works it explicitly states that they use blockchain analysis.
Therethrough, they fulfilled FinCEN requirements to have effective technique that prevents money laundering with the aid of their service, didn't they?
Quote from: https://www.fincen.gov/sites/default/files/2019-05/FinCEN%20Guidance%20CVC%20FINAL%20508.pdf
I wonder what they do with data gathered in the course of blockchain analysis. Do they destroy them due to the passage of time or accumulate data just for the occasion. As far as is known, there are occasions when business has no option to refuse government"s requests.