Earlier quoted context omitted.
Homebrew maintainer here. That language could probably be more precise - only current maintainers have access to detailed analytics (the details being specified on that same page). I wasn't part of the creation of that particular page, but one thing we (the maintainers) commonly find ourselves doing is publicly referencing install statistics as justification for removing an unused formula or taking extra care during…
Mildly unrelated question. Why is telemetry collected through Google? I suppose that’s because they have some particularly convenient APIs, however please consider that many user are concerned by the amount of information Google has about their lifes. (I know, it’s possible to opt out, but good choices should be the default!)
No-one else provides anywhere near the same scale for free. We have over a million monthly active users and every other solution we tried (including FOSS ones) either fell over at that load or we couldn't find anyone willing to provide hosting for us.
We don't send any personally identifiable information to Google. You are tracked by a randomly generated UUID (which you can regenerate at any time) and we tell Google to not store IP addresses.