I have been trying to work how the WMF or its suppliers have chosen to
use pixel tracking methods on Wikimedia projects, and exactly what
data is tracked, who can access it and if it ever gets officially
deleted, but failed so far.
There was some past speculation that some banners were using pixel
tracking, but apart from the cookie statement published by request of
WMF legal in 2015, I have been unable to find precise explanations
of how this has been part of banner design, used on external landing
pages, or whether pixel tracking had ever been used more directly by
being integrated or tested on Wikimedia projects. Naturally this leads
to questions about legitimate use of pixel tracking data and what/who
it is tracking.
It would be much appreciated if anyone can provide a link to an
official statement given by the WMF that pixel tracking is used on its
sites outside of fundraising banners, or its supplier's sites, and any
example cases or reports of where it is happening.
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