Dead customers can't return anyway.
All data as of August 2022.
[pdf] https://www.networkforphl.org/wp-content/uploads/2023/01/Leg...
> Forensic chemists discovered fentanyl and fentanyl-related substances including acetyl fentanyl, carfentanil, Furanylfentanyl, and p- fluoroisobutyryl fentanyl in over 180 cocaine exhibits.
It’s fairly cumbersome and removes a lot of the appeal of the drug. Most casual cocaine users want the experience to be just that, casual. Having to buy a bag of blow then go home and run a chemistry experiment on it is a much different vibe than taking quick bump from some nice new friend you made at the bar.
Most people I know who are casual users have just decided to stop instead of going through the hassle.