It isn't only corporate development teams — open source development teams want to spy on their users, too. For instance, Homebrew: "Anonymous analytics allow us to prioritise fixes and features based on how, where and when people use Homebrew." [1]

[1] https://docs.brew.sh/Analytics

Is it spying if:

1. It's anonymous

2. They're telling you they're doing it

3. You can opt out of it