Data on tracking collected by whotracks.me (Cliqz, owns Ghostery):
Google, comscore, Facebook, Amazon, Criteo, Yandex and Cloudflare in the top stats.
The "unofficial" Information Retrieval Mastodon Instance.
Goal: Make idf.social a viable and valuable social space for anyone working in Information Retrieval and related scientific research.
Everyone welcome but expect some level of geekiness on the instance and federated timelines.