An analysis of the Reddit website showed the use of the DRM system used to track users.
The purpose of DRM within web browsers is in it’s nature not used for telemetry purposes and in this case by making use of the technology the company deceives their website visitors.
source: https://smitop.com/post/reddit-whiteops/
archived source: https://wellthissucks.xyz/2020/07/08/reddit-website-uses-drm-for-fingerprinting-archived-source/