In principle, the Go telemetry could instead be hooked up to a build-system-specific metric reporting system, and the results from that could then be shared with the Go team. A company that uses a Google-style build system could do that kind of integration work if they wanted to contribute their data. But this doesn't make sense for the scenario where the Go compiler is running on some individual dev's machine; there, you want it to upload the data to Google's servers itself.