We are turning on telemetry in the next release for our open source tool. https://github.com/getgauge/gauge
We are small team with limited resources.
In our tool, it's easy to turn telemetry off, inspect what data is sent and the data collected is public.
The data "really" helps to make the tool better and an opt-in skews the data.
We've published an blog post https://blog.getgauge.io/why-we-collect-data-b19df366b677 and will put it up in the release notes and the download section.
What else can be done so that users don't blow up?