We don't. We suggest a list that is used very widely across the adblocking community enjoying a high reputation. We suggest it only to give users something to use right after the initial installation without having to invest any more work in researching other lists.
I should mention that I use this particular list since the very first days of Pi-hole and am completely satisfied with the results I obtain. I have no need to millions of blocked domains it seems.
This actually happens. And I find it not surprising at all. However, we always respond with the exact same text to these mails:
Pi-hole does not maintain or curate any blocklists. These are maintained and curated by independent parties, and we have no control of or input to the content of those lists. Furthermore, we have no influence on which lists are picked by users.
You can contact the maintainers of those lists if you believe that your domains are included in error.
And you can even verify yourself this is true:
- The adlist that is suggested in the beginning is GitHub - StevenBlack/hosts: 🔒 Consolidating and extending hosts files from several well-curated sources. Optionally pick extensions for porn, social media, and other categories. and indeed maintained by an independent party.
- Pi-hole is not doing any other nasty things like whitelisting domains for you.
Other projects may be doing such things because they know what is "good for you" (or, rather, their own pocket). It is very important for us to make this clear. Pi-hole is not only an adblocker, given you are using the right lists, it also blocks trackers.