Running Byzantium, auditing OS-level telemetry (have not yet installed something like Open Snitch).
Debian’s popularity-contest is not installed by default, correct? Does anyone choose to run this?
Is there any other (including “anonymized”) telemetry in Byzantium?
If you were super-concerned about telemetry, you would want to disable automatic updates - because by doing updates you are telling Purism exactly what packages you specifically have installed and what versions etc.
However obviously that is a major security trade-off. If it makes it less likely that you have all the latest security patches then what you may gain in privacy from Purism, you may lose in privacy to some hacker.