* That Phone in your pocket? "No problem"
* The browser you're using right now? "This is fine"
* Your internet-enabled TV? "All good"
* Open source project collecting usage metrics? "Woah, hold on there buddy"
Get some perspective.
They're completely transparent about which very limited usage metrics they use. You can inspect exactly which metrics are sent. And you can turn off these metrics if you want.
You're not paying anything for the product, and the analytics aren't being used to target you as a consumer, or to pitch advertising at you.
Simply by reading this page on hacker news you've sent more information to a third party than you would using brew.