A podping should mean the feed changed
Quote
So the the pod ping, pod ping is supposed to be an alert system that says, hey, an event just happened in the feed, go check the feed.
Episode 107: Clippy for Developers! (episode page, opens in a new tab) 00:45:54 (play audio from this timestamp, opens in a new tab)
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Summary
Dave's mental model for Podping: it reflects events in the feed. If the feed didn't change, there shouldn't be a ping. A metadata change like swapping a host is a legitimate event.