How transparent is Scarf's product adoption metrics for OSS projects? https://about.scarf.sh/ https://about.scarf.sh/ I follow them on Twitter but haven't look

How transparent is Scarf's product adoption metrics for OSS projects? https://about.scarf.sh/ https://about.scarf.sh/ I follow them on Twitter but haven't looked much into it other than reading their documentation, which makes me think that most of their telemetry is done at the point of the package distribution system: https://about.scarf.sh/package-sdks https://about.scarf.sh/package-sdks