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Reddit:

Blacklight detected trackers on this page sending data to companies involved in online advertising. Blacklight detected scripts belonging to the companies Alphabet, Inc. and TowerData, Inc..

Blacklight detected 9 third-party cookies on this site. Blacklight detected cookies set for TowerData, Inc., Alphabet, Inc. and Kantar Operations.

https://themarkup.org/blacklight?url=reddit.com

Stacker News:

No ad trackers found on this site.

Third-party cookies not found.

https://themarkup.org/blacklight?url=stacker.news