Having recently set up sentry, at least one of the ways they use this is to auto-configure uptime monitoring. Once they know what hosts you run, it'll ping tha

Having recently set up sentry, at least one of the ways they use this is to auto-configure uptime monitoring. Once they know what hosts you run, it'll ping that hostname periodically. If it stays up and stable for a couple days, you'll get an alert in product: "Set up uptime monitoring on <hostname>?" Whether you think this is valid, useful, acceptable, etc. is left as an exercise to the reader.