This got me thinking: Are there prominent examples of open source projects that 1. collect telemetry, 2. without a way to opt-out (or obfuscating / making it difficult to opt-out)? This practice seems to be specific to corporate software development.

Why is it that startups and commercial software developers seem to be the only ones obsessed with telemetry? Why do they need it to "optimize user journeys" but open source projects do just fine while flying blind?