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Adding PieFed/Lemmy to lists of privacy options could raise awareness of its existance
(media.piefed.social)
A community to organize and discuss the growth of the fediverse as a whole
With the big difference being that all that data is what the users explicitly put into it. No hidden trackers.
I think they are trying to say that any instance could theoretically add hidden trackers to their own website, which is not the same as users putting in their own data.
Where of course the distributed nature can hopefully keep any one instance from becoming too powerful.