Their privacy policy is rock solid, and there is no business incentive for them to do so, at the moment.

Did you mean western?

I run Prometheus on a separate cluster, so I plug my servers with node_exporter and scrape metrics. I then alert with grafana. To be honest, the setup is heavier (resource usage-wise) than I would like for my use case, but it’s what I am used to, and scales well to multiple machines.