Ghostery also had an incident [1] last month where they exposed e-mail addresses of some users, which I guess adds further doubt to their reliability.
[1]: https://www.ghostery.com/blog/ghostery-news/ghostery-email-i...
[1]: https://www.ghostery.com/blog/ghostery-news/ghostery-email-i...
The exposure happened because they sent a mail with a lot of people in the CC: field. Amateurish but it happens. The irony is that the mail was to inform you of the privacy changes due to GDPR.