Why does it not suffice to examine 'pip install Django' metrics from PyPI? That would be a reliable indicator of the relative popularity of the package against other packages in a level playing field.

While it would overcount the number of true installations of projects using Django, judging by the number of times I spin up a VM for testing, I would still argue that would be a better metric than a custom GA integration for which you'd have no relevant point of comparison. Even if they were to make this opt-out, what would they compare it to?

A: "Based on our custom GA developer tracking, we count 400,000 new Django projects this month."

B: "Django is the 4th most frequently installed third party Python package, based on the Python package index."

Personally I'd trust statement B more than A. No one can independently verify statement A.