> Some of the times it's to make the product better, or better targeted.

Homebrew lead maintainer here. This is exactly why we do it. To repeat myself from below: we're chronically understaffed and underfunded.

> Furthermore, now that you know, for brew specifically, will you opt out?

It's worth noting: if everyone who uses a niche piece of software opt-out when it breaks we'll look at our analytics and likely remove it from Homebrew instead of fixing it. This may be unfair but given the amount of work: we need ways to prioritise. Analytics have helped us do that so we can prioritise fixes on things that are critical for many people.