A real-world data point on the Users figure, since this page only says it counts installations rather than activity: in August my extension's listing reported about 5,000 users. The breakdown was 97% United States and 79% ChromeOS, and nothing else I could measure moved with it, so I never believed it. By October the figure had dropped to 22, which matches what I can actually observe. Lesson: before you quote this number, look at the country and OS breakdown. A distribution that looks nothing like your audience is probably not your audience. My extension has no telemetry by design, so I count real use from the outside instead: how many distinct keys have published something with it.
https://developer.chrome.com/docs/webstore/metrics
Read the thread: https://briskness-byte.github.io/thread/?url=https%3A%2F%2Fdeveloper.chrome.com%2Fdocs%2Fwebstore%2Fmetrics
