Interesting; I don't see apt, dpkg, nix, or yum maintainers releasing top lists of packages. Even the package providers rarely provide a "top" list, especially one with compile-time flags.
Those flags being provided in this list are very explicit, which could be easily correlated with data provided (or harvested) by other parties.
> a good way to measure the health of the Homebrew ecosystem
What value does this really provide to the general public, other than a, ahem, "member" measuring contest? You already see this occurring in this very thread - the MySQL vs. PostgreSQL comments. I fully expect a "Node vs. X" one as well.
I can't remember whether the default is opt-out or in with the current installer.
It also doesn't sent data to a privacy abusing company like google.
Actually the data is sent to Google.